Fix weird behaviour in CommandArguments

Change-Id: I82691ba13fe290804589ca84fde855194b5b75b8
Reviewed-on: http://gerrit.dmdirc.com/926
Automatic-Compile: DMDirc Local Commits <dmdirc@googlemail.com>
Reviewed-by: Gregory Holmes <greg@dmdirc.com>

src/com/dmdirc/commandparser/CommandArguments.java

     public String getWordsAsString(final int start, final int end) {
         Logger.assertTrue(start <= end + 1);
 
-        final Pattern pattern = Pattern.compile("(\\S+\\s*){" + (start) + "}"
-                + "((\\S+\\s*){" + Math.max(0, end - start) + "}\\S+).*?");
+        final Pattern pattern = Pattern.compile("(\\S+\\s+){" + (start) + "}"
+                + "((\\S+\\s+){" + Math.max(0, end - start) + "}\\S+).*?");
         final Matcher matcher = pattern.matcher(line);
 
         return matcher.matches() ? matcher.group(2) : "";