missing space

Author: volker

src/main/java/com/inet/sass/function/TransparencyModificationFunctionGenerator.java

@@ -94,7 +94,7 @@ private void checkParameters(LexicalUnitImpl function,
             throw new ParseException(
                     "The function "
                             + function.getFunctionName()
-                            + "requires a number in the range [0, 1] as its second parameter",
+                            + " requires a number in the range [0, 1] as its second parameter",
                     function);
         }
     }