Minor text clarification: b:0 means 'no bs class'

Documentation/Report.rst

@@ -722,7 +722,7 @@ Column: _link
 +---+---+--------------+-----------------------------------+---------------------------+----------------------------------------------------------------------------------------------------------------------------------------+
 |   |   |Render        |r:<mode>                           |r:3                        |See: :ref:`render-mode`, Default: 0                                                                                                     |
 +---+---+--------------+-----------------------------------+---------------------------+----------------------------------------------------------------------------------------------------------------------------------------+
-|   |   |Button        | b[:0|1|<btn class>]               | b:0, b:1, b:success       |'b', 'b:1': a bootstrap button is created. 'b:0' disable the button. <btn class>: default, primary, success, info, warning,danger       |
+|   |   |Button        | b[:0|1|<btn class>]               | b:0, b:1, b:success       |'b', 'b:1': with Bootstrap class 'btn btn-...'. 'b:0' no Bootstrap class. <btn class>: default, primary, success, info, warning,danger  |
 +---+---+--------------+-----------------------------------+---------------------------+----------------------------------------------------------------------------------------------------------------------------------------+
 |   |x  |Picture       |P:<filename>                       |P:bullet-red.gif           |Picture '<img src="bullet-red.gif"alt="....">'.                                                                                         |
 +---+---+--------------+-----------------------------------+---------------------------+----------------------------------------------------------------------------------------------------------------------------------------+