Workaround for aspell backslash escaping issues (#975).
Workaround for aspell backslash escaping issues (#975).

Still a WIP; the test now

- uses perl instead of awk;
- strips \n and \t when they follow non-ws characters;
- leverages aspell's URL mode to prevent FPs on encoded URLs.

As a result, `\suffix` and `\example` are spellchecked as
"suffix" and "example", while `foo\tbar` is treated as "foo bar".

perl6/doc,tbrowder/doc,perl6/doc,MasterDuke17/doc,tbrowder/doc,perl6/doc,tbrowder/doc,perl6/doc,MasterDuke17/doc,MasterDuke17/doc,tbrowder/doc,MasterDuke17/doc,perl6/doc