Tighten the regex in Issue 6 bugfix.

Checks for complete action names before escaping &'s

todo.sh

@@ -248,7 +248,7 @@ cleaninput()
     input=`echo $input | tr -d '\r|\n'`
 		
     # Check which action we are being used in as this affects what cleaning we do
-    if [[ $action =~ (append|app|prepend|prep|replace) ]]; then
+    if [[ $action =~ ^(append|app|prepend|prep|replace)$ ]]; then
         # These actions use sed and & as the matched string so escape it
         input=`echo $input | sed 's/\&/\\\&/g'`
 		fi