[augeas-devel] Path expressions: allow whitespace in labels

[lutter at redhat.com]

Path expressions currently do not allow whitespace in labels; that means
that you can't write

   match '/files/etc/php.ini/mail function/SMTP'

instead, you have to write

   match '/files/etc/php.ini/mail\ function/SMTP'

This is awkward for tools that use augeas, like netcf[1] There's actually
no harm in allowing whitespace inside path components. This patch makes the
first form of the match legal.

Note that space is still stripped from the beginning and end of path
components, i.e. '/files/ etc ' is the same as '/files/etc'; I hope nobody
is crazy enough to have file names start or end with whitespace. I am sure
I'll be proven wrong.

David

[1] The bug that sparked this: https://bugzilla.redhat.com/show_bug.cgi?id=700608