Merge pull request nus-cs2103-AY2122S1#76 from SHEZADHASSAN22/parseFirstArg-fix

fix parseFirstArgs

Author: rohit0718

src/main/java/seedu/address/logic/parser/ParserUtil.java

@@ -349,7 +349,7 @@ public static Module parseModule(String code, Optional<String> name) throws Pars
      * @throws ParseException if the args string is invalid.
      */
     public static Type parseFirstArg(String args, String errorMessage) throws ParseException {
-        String firstArg = args.split(" ", 2)[0];
+        String firstArg = args.trim().split(" ", 2)[0];
         switch (firstArg) {
         case "mod":
             return Type.MOD;