Add less-stripped regression test

The original `less` help message's format forces cmd-help to exit early.
Stripped means that we've filtered those characters with
`bat --strip-ansi=always` and/or
`sed 's/.\x08//g'`

Cf: https://github.com/victor-gp/cmd-help-sublime-syntax/wiki/Configuration-tips#removing-special-characters-from-the-help-message

Lots of inconsistencies in this help message. I'll come back at some
point and try to fix them.

Author: victor-gp

syntaxes/cmd-help.sublime-syntax

@@ -88,9 +88,9 @@ scope_variables: # last scope is matched first
 
 contexts:
   prototype:
-    # abort if color escape codes
+    # exit if there are color escape codes
     - include: color-escape-codes-sink
-    # abort if formatted with backspaces
+    # exit if there are backspaces (overstrike formatting)
     - match: (?=.*[\b])
       set: sink