Made syntax of syntax descriptions consistent:

* <xyz> denotes that some string must be used which is not a fixed value (e.g., a command), but a variable string (text, a number, ...)
* [xyz] denotes that the parameter is optional
* abc|xyz denotes that either abc or xyz must be given

parser-specs/config.spec

@@ -103,8 +103,6 @@ state WORKSPACE_LAYOUT:
 
 # new_window <normal|1pixel|none>
 # new_float <normal|1pixel|none>
-# TODO: new_float is not in the userguide yet
-# TODO: pixel is not in the userguide yet
 state NEW_WINDOW:
   border = 'normal', 'pixel'
       -> NEW_WINDOW_PIXELS