Added tests for removing additional leading/trailing colons.
Added tests for removing additional leading/trailing colons.

rstacruz/chruby-fish,JeanMertz/chruby-fish,kbrock/chruby,eunomie/chgo,ilikepi/chruby,rstacruz/chruby-fish,postmodern/chruby,eunomie/chgo,postmodern/chruby,JeanMertz/chruby-fish,ilikepi/chruby,ngpestelos/chruby,ngpestelos/chruby,kbrock/chruby,regularfry/chruby,regularfry/chruby