Fix runtime error occurred e.g. with docbook-to-man calls:
grep: character class syntax is [[:space:]], not [:space:]
grep: character class syntax is [[:space:]], not [:space:]
jw: There is no frontend called "/docbook/utils-0.6.14/frontends/docbook".
See also:
<https://qa.mandriva.com/show_bug.cgi?id=61127>
Signed-off-by: Steffen Sledz <sledz@dresearch-fe.de> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
