clarify intent

cc: @mtodd

Author: raganwald

app/assets/javascripts/task_list.coffee

@@ -115,10 +115,10 @@ completePattern = ///
 # Useful when you need iterate over all items.
 itemPattern = ///
   ^
-  (?:                     # optional list prefix, consisting of
+  (?:                     # optional prefix, consisting of
     \s*                   # optional leading whitespace
     (?:>\s*)*             # zero or more blockquotes
-    (?:[-+*]|(?:\d+\.))   # item indicator
+    (?:[-+*]|(?:\d+\.))   # list item indicator
   )?
   \s*                     # optional whitespace prefix
   (                       # checkbox