Regular expression matching on symbols changed in Ruby 1.9

In Ruby 1.8 a regular expression match on a symbol would never match, while in
Ruby 1.9 it is equivalent t a regular expression match on the equivalent
string. This is very sensible behaviour, but trips up parts of code that
expect an implicit "... but not symbol" match.

Signed-off-by: Daniel Pittman <daniel@puppetlabs.com>