Fix for autocomplete things beginning with / and make it work still for things without /

[mattiasrunge]

When returning an array of matches to autocomplete which begins with / it ignored the result.
If trying to autocomplete "/t" with result [ "/test/" ] the match was discarded.
Though trying to autocomplete "t" with [ "test/" ] would give the expected result.

This fix makes both cases work.

[dthree]

Thanks. Can you add a test for this?

[milesj]

@mattiasrunge You around to add a test?

[mattiasrunge]

Could maybe do it, but don't have time currently so it will be a while before I can help, sorry.