$to =~ s/(\b$Modifier$)/$1 /; $in_comment = 0; (sh|pl|py|awk|tc)$/) { $range_last_linenr = $new_linenr; } my $count = 0; "patch seems to be corrupt (line wrapped? "switch default: should use break\n" . [\s$;]*$/); return $string; # ; should have either the end of line or a space or \ after it $herecurr) && qr{(?:(? if (defined $fix_elements[$n + 2] && $ctx !~ /[EW]x[EW]/) { if ($msg_type ne "" && $rawline =~ m@^\+[ \t]*.+\*\/[ \t]*$@) { #non blank */ --terse one line per report if ($c eq $close && $level > 0) { :\s*\)+\s*|\s*)[;:,]/) { $in_commit_log = 0; $tmp_stmt =~ s/\b$arg\s*\#\#//g; my $stashrawline=""; ^.(? my $space_after = $3; :un)?signed\s+)?long}, my $in_commit_log = 0; #Scanning lines before patch } # it there is no point in retrying a statement scan $herecurr); } !char\b|short\b|int\b|long\b)\s*($Ident)?\s*[=,;\[\)\(]}g) { $linenr++; qr{float}, sub fix_delete_line { "\n"; if ($line =~ /^.\s*$Modifier\s*$/) { } $herecurr) && $good = rtrim($fix_elements[$n]) . our $Member = qr{->$Ident|\.$Ident|\[[^]]*\]}; }; "space required after that '$op' $at\n" . next if ($line =~ m/^\s*$/); $res .= $1; "do not initialise statics to $1\n" . our $clean = 0; $realcnt-- if ($line =~ /^(? # do {} while (0) macro tests: } "Single statement macros should not use a do {} while (0) loop\n" . { ($rawline =~ /^\s+(? => \$check, }x; $lead = rtrim($1); qr{fastcall}, $case = 0 if ($line =~ /\b[Cc]ommit\s+[0-9a-f]{5,40}[^A-F]/); ctx_statement_full($linenr, $realcnt, $-[0]); :else|do)\b/s)); my $ctx_skip = $realcnt; "__scanf(string-index, first-to-check) is preferred over __attribute__((format(scanf, string-index, first-to-check)))\n" . # For example, HEAD-3 means we need check 'HEAD, HEAD~1, HEAD~2'. Find centralized, trusted content and collaborate around the technologies you use most. "do {} while (0) macros should not be semicolon terminated\n" . single git commit with: #warn "line\n"; next if ($line =~ m/^\s*$/); $remain_next, $off_next); :un)?signed| "; if (report("WARNING", $type, $msg)) { my $allWithAttr = "(?x: \n" . my @newlines = ($c =~ /\n/gs); $herectx .= $rl . "__setup appears un-documented -- check Documentation/admin-guide/kernel-parameters.rst\n" . } else { } $camelcase{$1} = 1; # if statements using unnecessary parentheses - ie: if ((foo == bar)) $herecurr) && CHK("MULTIPLE_ASSIGNMENTS", $hereprev); if (!$outer || $level <= 1) { $line_fixed = 1; $coff_set = 1; print << "EOM" fix_delete_line($fixlinenr - 1, $prevrawline); $bad_specifier = $specifier; :un)?signed\s+)?long\s+long\s+int}, time| my $previndent=0; "$stat_real\n"); $do_fix = 0; # check for smp_read_barrier_depends and read_barrier_depends print "QUESTION($1)\n" if ($dbg_values > 1); "DT compatible string vendor \"$vendor\" appears un-documented -- check $vp_file\n" . "Prefer $3(sizeof(*$1)) over $3($4)\n" . $res .= $type x length($1); my $herectx = get_stat_here($linenr, $cnt, $here); trim($fix_elements[$n + 1]) . " } {"; CHK("ARCH_INCLUDE_LINUX", "break quoted strings at a space character\n" . my $sub_to = $ident; $fix && $line =~ /^\+/) { LINENR => $linenr, To:| "Use of $attr requires a separate use of const\n" . sub show_type { my $func = $entry->[0]; $line_fixed = 1; # and whether or not function naming is typical and if "while should follow close brace '}'\n" . die "$P: $root: --root does not point at a valid tree\n"; $herecurr); if ($indent % 8) { my ($commit, $id, $desc) = @_; if ($line =~ /^.\s*(?:typedef\s+)?(enum|union|struct)(? $octal_perms eq "0200") { WARN("LIKELY_MISUSE", + &newalias->metric_name); next if ($line =~ m/^\s*$/); # cpp #elif statement condition may start with a ( } } # Find out how long the conditional actually is. my $msg_level = \&WARN; ($stat, $cond, $line_nr_next, $remain_next, $off_next) = # 1) within comments push(@fixed_inserted, $inserted); $sline =~ /$Type\s*$Ident\s*$balanced_parens\s*\{/ && $hereprev); while (defined($deleted) && ${$deleted}{'LINENR'} == $old_linenr) { 'EXTRA_CFLAGS' => 'ccflags-y', NOTE: Whitespace errors detected. :\s*\#\#\s*[A-Za-z_][A-Za-z\d_]*)* $off++; ## if ($line =~ /^.\s*$Type\s+$Ident(?:\s*=[^,{]*)?\s*,\s*$Ident. # check for whitespace before a non-naked semicolon } It only takes a minute to sign up. # If this whole things ends with a type its most } "if this code is redundant consider removing it\n" . } $herecurr) && exit($exitcode); $last_after = $n; "S_IWUGO" => 0222, :${all}\b) if ($count == 1 && ($line =~ /^(? } elsif ($ctx =~ /^.\s*\#\s*elif\s*$/) { if (!defined $stat); $herecurr); $fix) { CHK("ASSIGNMENT_CONTINUATIONS", my $realcnt = 0; $has_statement = 1; $NonptrType = qr{ 0[0-7][0-7][2367] $suppress_statement = $line_nr_next; $type = 'N'; for (;;) { } "long udelay - prefer mdelay; see arch/arm/include/asm/delay.h\n" . if ($line =~ /\bMODULE_LICENSE\s*\(\s*($String)\s*\)/) { if (WARN("SYMBOLIC_PERMS", $line =~ s/,. $sline =~ /^\+\s+$Ident(? # and so hopefully shouldn't trigger false } } ERROR("LOCKING", Wall shelves, hooks, other wall-mounted things, without drilling? $files = `git ls-files "include/*.h"`; )/g) { The string.rstrip('\n') removes not only a single trailing newline character but as many as there are. "code indent should use tabs where possible\n" . } # , must not have a space before and must have a space on the right. } $fix) { + memset(newval, 0, sizeof(newval)); } qr{bool}, return "" if (!defined($string)); } if (($type eq '' || $type eq '{') && $c eq '{') { $opv eq '&U' || $opv eq '&&U') { @include_files = split('\n', $files); if ($line =~ /\bcommit\s+[0-9a-f]{5,}\s+\("([^"]+)"\)/i) { fix_insert_line($fixlinenr, $fixedline); } } } To remove multiple trailing newlines, pipe through: There is also direct support for white space removal in Bash variable substitution: If you want to print output of anything in Bash without end of line, you echo it with the -n switch. ## # continuation. my $name = ""; } $type = ''; while ($line =~ m{(? my $has_statement = 0; my $cnt = statement_rawlines($stat); defined $lines[$ctx_ln - 1]) } elsif ($dbg_type > 1 && $line =~ /^.+($Declare)/) { } > and numbers with leading zeroes. WARN("UNNECESSARY_PARENTHESES", $delta_offset = 0; if (defined $2 && $type eq 'C' || $type eq 'T') { $fix) { $off--; { $type = 'N'; "$here\n$stat_real\n"); my $mods = "(?x: \n" . } # check for k[mz]alloc with multiplies that could be kmalloc_array/kcalloc $herecurr); :\#\s*$Ident|\#\s*$Constant)\s*$/ && # stringification #foo WARN("PRINTF_Z", "$call() should probably be ${call}_t($cast, $arg1, $arg2)\n" . } # at end-of-function, with the previous line a single leading tab, then return; foreach my $fixed_line (@fixed) { last if ($lastpos > 0 && ($curpos - length($omatch) != $lastpos)); :un)?signed\s+)?long\s+int}, } "'$typo' may be misspelled - perhaps '$typo_fix'?\n" . if (($opens == 0) || ($closes >= $opens)) { possible($type, "A:" . ($stat, $cond, $line_nr_next, $remain_next, $off_next) = return ""; if (defined $root && $fix_elements[$n + 2] =~ s/^\s+//; :$Ident|-?$Constant);$/ && # foo(); $line !~ /\G(? "FILE: $realfile\n"; sub expand_tabs { $fix) { ctx_statement_block($linenr, $remain, $off); $fmt =~ s/%%//g; print " $word"; __nocast| $fixed[$fixlinenr] =~ s/\s+$//; } possible($1, "C:" . *)$/) { 528), Microsoft Azure joins Collectives on Stack Overflow. :static\s+|const\s+)?char\s+\*\s*\w+\s*\[\s*\]\s*=\s*\{/) { # Make sure we remove the line prefixes as we have $herecurr); $a = 'C' if ($elements[$n] =~ /$;$/); } "plain inline is preferred over $1\n" . $rawline =~ m@^\+([ \t]*)\*@; my $compat2 = $compat; } $line_fixed = 1; last if (!defined $lines[$line]); + ret = 0; if (WARN("BAD_SIGN_OFF", 'no-color' => \$color, #keep old behaviors of -nocolor # In mailback mode only produce a report in the negative, for Consider more restrictive permissions.\n" . "^"; '(*' . It would not be uncommon to pipe to the tr utility, or to Perl if preferred: You can also use command substitution to remove the trailing newline: If your expected output may contain multiple lines, you have another decision to make: If you want to remove MULTIPLE newline characters from the end of the file, again use cmd substitution: If you want to strictly remove THE LAST newline character from a file, use Perl: Note that if you are certain you have a trailing newline character you want to remove, you can use head from GNU coreutils to select everything except the last byte. our $Storage = qr{extern|static|asmlinkage}; $spelling_fix{$suspect} = $fix; } # then count those as offsets. "space required before the open parenthesis '('\n" . # check for vsprintf extension %p misuses $new_leading_tabs = $1; if ($rawline =~ /^[ \+]\s*\#\!\s*\//) { "braces {} are not necessary for any arm of this statement\n" . #print "APW: ALLOWED: lines block\n"; print "OP($1)\n" if ($dbg_values > 1); # if ($line =~ /^.\s*\#\s*if(|n)def/ && ($realfile =~ /\.c$/)) { 0 : 1; */s) { } "S_IRUGO" => 0444, $type = 'c'; *)/i) { die "$P: $filename: git format-patch failed - $!\n"; next if ($word =~ m/^\s*$/); my $sig_nospace = $line; $is_patch = 1; # Block comment styles # warn about #if 0 if ($line =~ /\bstatic\s+char\s+(\w+)\s*\[\s*\]\s*=\s*"/) { "usleep_range should not use min == max args; see Documentation/timers/timers-howto.txt\n" . # typecasts on min/max could be min_t/max_t } $level = "warn" if ($level eq "warning"); } elsif ($dstat =~ /;/) { # Prevent --color by itself from consuming other arguments my ($string, $find, $replace) = @_; foreach my $arg (@def_args) { substr($res, $off, 2, "$;$;"); (?:(? # check for new externs in .h files. The xargs command reads data from the standard input such as keyboard, delimited by blanks (which can be protected with double if ($realfile !~ m@\binclude/uapi/@ && our $typeOtherOSTypedefs = qr{(?x: $type . if ($^V && $^V ge 5.10.0 && return 0; } } } elsif ($op eq '//') { "$here\n$stat\n"); pathname expansion are not performed on ERROR("CORRUPTED_PATCH", + perf_pmu_assign_str(old->name, "long_desc", &old->long_desc, $root = '. $address = $1; my $type = ''; percentage="60%" number=$ {percentage%\%} This statement removes the shortest matching substring (in this case an escaped %) from the end of the variable. ^ if ((($ptr =~ /\b(union|struct)\s+$attr\b/ && if ($2 ne '') { my ($str) = @_; if (!top_of_kernel_tree($root)) { ##print "stat stat_next\n"; my $condition = substr($blk, $soff, $coff - $soff + 1); our $signature_tags = qr{(?xi: if ($line =~ /\bsizeof\s*\(\s*\&/) { $fixed[$fixlinenr] =~ s/\bsizeof\s+((?:\*\s*|)$Lval|$Type(? $fix) { my $new_leading_tabs = ""; if (WARN("INLINE", :^|\s)(/\S*)}g) { WARN("VSPRINTF_SPECIFIER_PX", $herecurr) && # if should not continue a brace print "$linenr > .$outline\n"; 'emacs!' $lc = $lc + $linenr; # (common in inline assembly) or is a octal \123 or hexadecimal \xaf value } # We need \b after 'init' otherwise 'initconst' will cause a false positive in a check # check for const const where is not a pointer or array type #print "C: c s remain\n"; )\s*([=;])\s*/"$1" . $address = ""; ERROR("GIT_COMMIT_ID", $herecurr) && # Make $define_stmt single line, comment-free, etc } ($line =~ /(?:\s|^)[0-9a-f]{12,40}(? # print("line: \nprevline: \ns: \nc: \n\n\n"); if (WARN("QUOTED_WHITESPACE_BEFORE_NEWLINE", cat_vet($rawline) . (If It Is At All Possible). } # check for gcc specific __FUNCTION__ my ($hashRef, $arrayRef) = @_; if ($line =~ /\/\/(. $hereptr)) { ERROR("LOCKDEP", } Cc: } ## print "2: from to ident\n"; next; # Check for illegal assignment in if conditional -- and check for trailing my $len = length($line); # specific definition of not visible in sysfs. "Use of boolean is deprecated, please use bool instead.\n" . trim($fix_elements[$n + 1]); exit($exit); WebLKML Archive on lore.kernel.org help / color / mirror / Atom feed * [PATCH 1/3] perf alias: Remove trailing newline when reading sysfs files @ 2018-06-14 11:48 Thomas Richter 2018-06-14 11:48 ` [PATCH 2/3] perf alias: Rebuild alias expression string to make it comparable Thomas Richter ` (3 more replies) 0 siblings, 4 replies; 16+ messages in } WARN("PREFER_ALIGNED", open(my $conffile, ') { my @allowed = (); $lines[$linenr - 3] =~ /^[ +]/ && ## } } $herecurr); print '-' x length($vname) . my @stmt_lines = ($stmt =~ /\n/g); :$Ident|-?$Constant),$/ && # 10, // foo(), # (\b) rather than a whitespace character (\s) fix_insert_line($fixlinenr, $fixedline); # check for static initialisers. if ($line =~ /\+\s*#\s*define\s+((?:__)?ARCH_(? elsif ($ctx =~ /$Type$/) { \#| } # A colon needs no spaces before when it is } } shift(@ctx); if ($type eq '{' && $c eq '}') { $fix_elements[$n + 2] =~ s/^\s+//; print report_dump(); if (defined $2 || defined $7) { # canonical declaration is "type (*funcptr)(args)" $herecurr) && } "\"(foo$from)\" should be \"(foo$to)\"\n" . > and terms specified as event=0x91 (read from JSON files). foreach my $entry (keys %mode_permission_string_types) { } ["SENSOR_(? Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. my $ucfirst_sign_off = ucfirst(lc($sign_off)); +{ If this name is already # TEST: allow direct testing of the type matcher. my $match = $2; if (! $fixed[$fixlinenr] =~ s@(^\+\t+) +@$1 . $good = $fix_elements[$n] . ($stat !~ /$Ident\s*=\s*sscanf\s*$balanced_parens/ && } if ($allow_c99_comments && $res =~ m@(//. "TEST: is not type ($1 is)\n". (? # declarations always start with types $herecurr); our @typeListMisordered = ( } elsif ($cur =~ /^(sizeof)\s*(\()?/o) { my $post_funcname_space = $5; print "Must be run from the top-level dir. $rawlines[$ln - 1] =~ /^-/); } } $desc = substr($lines[0], 41); :$barriers) } qr{${Ident}_t}, } open(my $script, '; if ($off == $len) { } my $camelcase_file_seeded = 0; WARN("CVS_KEYWORD", @modifierListFile = (); These will not only remove the trailing newlines, but also squeeze any consecutive whitespaces (more precisely, as defined by, You can install gnu version of sed on mac, as. Additionally, one should be aware, that command substitution by POSIX specifications removes trailing newlines: $ echo "$ (printf "one\ntwo\n\n\n")" one two Thus, outputting a file via $ (cat @fixed_deleted = (); + list_for_each_entry(term, &alias->terms, list) { my @res = (); $line !~ /\b__bitwise\b/) { if (ERROR("SPACING", [ch]$/ && $line =~ /^\+. } next if ($word !~ /[A-Z][a-z]|[a-z][A-Z]/); my $nl = $l + $length; my $underscore_smp_barriers = qr{__smp_(? if (($realfile =~ /^$/ || $line =~ /^\+/) && You can join his free email academy here. return $string; $orig_desc = $1; # Guestimate if this is a continuing comment. my $lead = $1; my @array = split(/,/, join(',', @$arrayRef)); if ($realfile !~ m@^include/uapi/@ && cat_vet($rawline) . if ($lead !~ /(?:$Operators|\. "space prohibited between function name and open parenthesis '('\n" . if ($rtrim_before || $space_after) { # on the line } } $fix) { # More special cases if ($line =~ /^.\s*sema_init.+,\W?0\W?\)/) { # check for line continuations in quoted strings with odd counts of " my $offset = $herecurr); } # '*'s should not have spaces between. $off++; : __initdata) $err .= "$sep$ctx\n"; } "Prefer pr_warn( to pr_warning(\n" . (?:\s*$;*)(?:\s*{)?(?:\s*$;*)(? $prevline =~ /(? # } elsif ($op =~ /^$;+$/) { $sline =~ /^\+\s+$Ident\s*:\s*\d+\s*[,;]/ || $hasparens = 1; $pre_args_space =~ /^\s/) { No warranties, expressed or implied # (?:(? $rawline !~ /^\+\Q$comment\E SPDX-License-Identifier: /) { Make exceptions when the previous string ends in a # use the default permissions my $semis = $3; rtrim($pointer) . @typeListMisordered, VM-Ware VM-Festplattendatei konsolidieren 99% hngt was nun. )/o) { } *"\s*$/ && *)\s*}\s*while\s*\(\s*0\s*\)\s*([;\s]*)\s*$/) { } Card trick: guessing the suit if you see the remaining three cards (important is that you can't move or turn the cards). #print "BB\n"; }; $suppress_export{$realline_next} = 1; Ask Ubuntu is a question and answer site for Ubuntu users and developers. :un)?signed\s+)?short}, # LONG_LINE all other lines longer than $max_line_length "Bad function definition - $1() should probably be $1(void)\n" . # checks for new __setup's $use =~ s/pS/ps/ if ($bad_specifier =~ /pf/); "Avoid multiple line dereference - prefer '$ref'\n" . if ($realfile !~ m@\binclude/uapi/@ && __force| WARN("UNDOCUMENTED_DT_STRING", # Strip the diff line prefixes and rip blank lines at start and end. "S_IWOTH" => 0002, if (ERROR("TRAILING_WHITESPACE", # check for struct spinlock declarations my ($match, $from, $to, $ident) = ($1, $2, $2, $3); *)\bif\b/ && $1 !~ /else\s*$/) { } $fix) { my $s = $stat; $stat =~ /^\+(?:.*? $line !~ /^.\s*$Declare\s. :union|struct|enum|typedef)\b/ || *\\$/ && # asm return 1; } "Macro argument '$arg' may be better as '($arg)' to avoid precedence issues\n" . ## WARN("SPACING", ERROR("TRAILING_STATEMENTS", (? "Use of const init definition must use ${attr_prefix}initconst\n" . } }x; __kprobes| if (ERROR("SPACING", $line !~ /^\s*(? exit(0); $herecurr) && &&|\|\||,|\^|\+\+|--|&|\||$Arithmetic the results. if (WARN("DEVICE_ATTR_RO", # done $type = 'V'; } if ($lines[$ln - 1] =~ /^\+\s*(? } my @setup_docs = (); sanitise_line_reset(); "\n)"; s/\s+\)/\)/; if ($line =~ /(\bif\s*|)(\(\s*$Ident\s*(? if (CHK("SPACING", if (top_of_kernel_tree('.')) *)$/) { for ($off = 1; $off < length($line); $off++) { } :_ratelimited|_once)?\s*\(/ && } $line =~ m/\b(? $herecurr) && "EXPORT_SYMBOL(foo); should immediately follow its function/variable\n" . $herecurr); $fix) { if (-e "$path/$conf") { CHK("OPEN_ENDED_LINE", my ($off, $dstat, $dcond, $rest); } print "\n"; Dual\ BSD/GPL| $prevline =~ /(? my @stmt_array = split('\n', $define_stmt); our $mode_perms_string_search = ""; *\bpacked\b/) { $fixed[$fixlinenr] =~ s/\s*$level\s*//; next; # return is not a function # recommend kstrto* over simple_strto* and strict_strto* } :\&\&|\|\|) :static\s+))/; trim($r2)/e; @typeList, $rawline =~ /\b675\s+Mass\s+Ave/i || our $Operators = qr{ } $good = $fix_elements[$n] . ($line=~/\#\s*include/)) { } elsif ($filename eq '-') { $fix) { my $camelcase_seeded = 0; $curpos = pos($string); if (!defined $camelcase{$word}) { if ($#ARGV > 0 && $quiet == 0) { $define_stmt .= substr($l, 1); # check multi-line statement indentation matches previous line } if ($rawlines[$ln - 1] =~ m@(/\*|\*/)@ && WARN("STATIC_CONST_CHAR_ARRAY", if ($is_patch && $has_commit_log && $chk_signoff && $signoff == 0) { $signoff++; : "TEST: is type\n" . WARN("SSCANF_TO_KSTRTO", $comment = '#'; "Using weak declarations can have unintended link defects\n" . next; How can we remove text from start to some particular selected word using sed command in linux. if ($off > 0) { :$Ident|\(\s*\*\s*$Ident\s*\))\s*\(\s*([^{]+)\s*\)\s*;/s && (-f $file)); :\s+$Sparse)*\s*\**\s*(:?\b$Ident)?$/s || $arg =~ /^($Ident)$/s) { } $line = expand_tabs($line); my $comment = ""; if ($line =~ /^\+\s*$String/ && Start here for a quick overview of the site, Detailed answers to any questions you might have, Discuss the workings and policies of this site, Learn more about Stack Overflow the company, Nice! "Comparing jiffies is almost always wrong; prefer time_after, time_before and friends\n" . $fix) { } elsif ($cur =~ /^(\(\s*$Type\s*)\)/ && $av_pending eq '_') { my $hereptr = "$hereline$ptr\n"; To subscribe to this RSS feed, copy and paste this URL into your RSS reader. } } elsif ($cur =~ /^(\#\s*(? $fix) { (? 'debug=s' => \%debug, $stat !~ /\bsscanf\s*$balanced_parens\s*(? "$comment" ne $email && my $use = ""; "vendor-prefixes.txt"; $line =~ /(__constant_(?:htons|ntohs|[bl]e(?:16|32|64)_to_cpu|cpu_to_[bl]e(? print "PAREN('$1')\n" if ($dbg_values > 1); $c = 'C' if ($elements[$n + 2] =~ /^$;/); $previndent == $indent) { :\s+$Ident)?\s*$/) { # If we have no input at all, then there is nothing to report on CHK("MACRO_ARG_REUSE", # if ($ms_val =~ /^(? :$barrier_stems) "S_IRWXO" => 0007, $line =~ /^\@\@ -\d+(?:,\d+)? } my $dbg_values = 0; my $at = "(ctx:$ctx)"; to bare use of '$sign" . "$1read_barrier_depends should only be used in READ_ONCE or DEC Alpha code\n" . :un)?signed}, __percpu| ")"/ex; $herecurr) && if (ERROR("SPACING", Heres an example of a string with the mixed trailing whitespace sequence '\n\n\n \t \n ': The output shows that all trailing whitespace characters have been removed: Okay, theres something missingwhat if you want to remove only a single (but not multiple) trailing newline characters? $prevline =~ /^.\s*$/ && :checkpatch|sparse|smatch)\b[^:]/i) { } foreach my $check (@tree_check) { return substr($rawline, $-[0], $+[0] - $-[0]); if ($prevline=~/}\s*$/ and $line=~/^.\s*else\s*/ && # : when part of a bitfield $commit_log_has_diff = 1; } my $blk = ''; my $tested = quotemeta($1); ERROR("SPACING", } splice(@lines, 1, 1); :un)?signed| :\s*\|\s*${single_mode_perms_string_search})* if ($line =~ /^.\s*__initcall\s*\(/) { my $continuation = 0; Before and must have bash remove trailing newline from variable space character\n ''. things ends with a type its most } `` this. 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