src/mkhelp: strip off escape sequences

At some point the nroff command stopped stripping off escape sequences,
so then this script needs to do the job instead.

Reported-by: VictorVG on github
Fixes #11501
Closes #11503

diff --git a/src/mkhelp.pl b/src/mkhelp.pl
index ba2e7c1d400d408ec7f83b3f89300885a7456b8b..19a30e2c812d8d4950f87e70a2b15e3bc5beccd2 100755 (executable)
--- a/src/mkhelp.pl
+++ b/src/mkhelp.pl
@@ -51,6 +51,7 @@ while (<STDIN>) {
     # remove trailing CR from line. msysgit checks out files as line+CRLF
     $line =~ s/\r$//;
 
+    $line =~ s/\x1b\x5b[0-9]+m//g; # escape sequence
     if($line =~ /^([ \t]*\n|curl)/i) {
         # cut off headers and empty lines
         $wline++; # count number of cut off lines