spacecheck: check long lines and repeat spaces, fix fallouts

Verify if lines are not longer than 192 characters. Also verify if lines
have less than 79 repeat spaces (and fix one fallout).

To improve readability by avoiding long lines and to prevent adding
overly long lines with text that may go unnoticed in an editor or diff
viewer.

In addition to pre-existing line length limits: 79 for C, 132 for CMake
sources.

Also:
- spacecheck: fix/harden allowlist regexes.
- spacecheck: tidy-up quotes and simplify escaping.
- spacecheck: allow folding strings with repeat spaces.
- GHA: fix a suppressed shellcheck warning.
- GHA/macos: simplify by dropping brew bundle.
- test1119.pl: precompile a regex.
- FAQ.md: delete very long link to a Windows 7/2008 support article
  that's lost it relevance.

Closes #21087

scripts/mk-ca-bundle.pl

@@ -173,7 +173,9 @@ sub HELP_MESSAGE() {
     print "\t-l\tprint license info about certdata.txt\n";
     print "\t-m\tinclude meta data in output\n";
     print "\t-n\tno download of certdata.txt (to use existing)\n";
-    print wrap("\t","\t\t", "-p\tlist of Mozilla trust purposes and levels for certificates to include in output. Takes the form of a comma separated list of purposes, a colon, and a comma separated list of levels. (default: $default_mozilla_trust_purposes:$default_mozilla_trust_levels)"), "\n";
+    print wrap("\t","\t\t", "-p\tlist of Mozilla trust purposes and levels for certificates to include in output. " .
+          "Takes the form of a comma separated list of purposes, a colon, and a comma separated list of levels. " .
+          "(default: $default_mozilla_trust_purposes:$default_mozilla_trust_levels)"), "\n";
     print "\t\t  Valid purposes are:\n";
     print wrap("\t\t    ","\t\t    ", join(", ", "ALL", @valid_mozilla_trust_purposes)), "\n";
     print "\t\t  Valid levels are:\n";