Bug Fix - parsing

- Now properly enumerates ambiguous commands.
- Now properly enumerates ambiguous colors.
- Now displays suitable error when a command like "task x" is entered.

src/Cmd.cpp

@@ -97,8 +97,6 @@ void Cmd::parse (const std::string& input)
 
     std::string combined;
     join (combined, ", ", matches);
-    error += combined;
-
     throw error + combined;
   }
 }