Documentation Update

- Added examples to the grammar file.
- Added recent change to ChangeLog, html/task.html.

ChangeLog

@@ -24,6 +24,7 @@
     and shadow files.
   + Fixed bug with the task sort alogrithm, which led to an unstable sequence
     when there were only a handful of tasks.
+  + Performance enhanced by eliminating unnecessary sorting.
 
 ------ old releases ------------------------------
 

grammar.bnf

@@ -1,7 +1,12 @@
 
 # This is a full BNF grammar for the task command line.  It is intended that a
 # future release of task will incorporate a complete lexer/parser implementing
-# this grammar.
+# this grammar, which will allow for more sophisticated command lines, for
+# example:
+#
+#    task delete 1 2 4-7
+#    task add pri:H pro:X -- pro pri 1 ///
+#
 
 command     ::= simple_command
               | filter_command filter?

html/task.html

@@ -118,6 +118,7 @@
                       and shadow files.
                   <li>Fixed bug with the task sort alogrithm, which led to an unstable sequence
                       when there were only a handful of tasks.
+                  <li>Performance enhanced by eliminating unnecessary sorting.
                 </ul>
 
                 <p>