Adding Ignore White Space Setting

Added a setting for whether or not each line gets trimmed of white space, before checking for duplicates.

highlight_duplicates.sublime-settings

@@ -3,5 +3,8 @@
 	"highlight_duplicates_color" : "invalid",
 
 	// By default plugin is enabled or disabled (true|false)
-	"highlight_duplicates_enabled" : true
+	"highlight_duplicates_enabled" : true,
+
+	// If true, whitespace gets trimmed off each line before checking for matching lines
+	"ignore_white_space" : true
 }

hightlight_duplicates.py

@@ -31,7 +31,10 @@ def count_lines(lines, view):
     '''
     counts = defaultdict(list)
     for line in lines:
-        string = view.substr(line).strip()
+        if bool(settings.get('ignore_white_space', DEFAULT_IS_ENABLED)):
+            string = view.substr(line).strip()
+        else:
+            string = view.substr(line)
         if is_candidate(string):
             counts[string].append(line)
     return counts