tim-vandecasteele/grape-swagger — pull request #155 by SleeplessByte (2014-10-15 06:16:52+00:00)
Title: Route prefixes can be symbols

Symbols can't be used to split. So whenever the prefix is a `Symbol`,
````
TypeError: wrong argument type Symbol (expected Regexp)
````
Since prefixes can't be anything else than a `String` or `Symbol`, you can safely convert to a `String`.