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/color.cpp

@@ -185,7 +185,6 @@ std::string guessColor (const std::string& name)
 
     std::string combined;
     join (combined, ", ", matches);
-    error += combined;
 
     throw error + combined;
   }