Allow disabling a symbol macro with a macro environment, #'cl-macroexpand 2011-07-03 Aidan Kehoe <kehoea@parhasard.net> * cl.el (cl-macroexpand): Allow code to disable a given symbol macro while expanding code by prepending a cons with a nil cdr to the macro environment.

@c Synced up with: Texinfo 4.13 of September 18 2008.
@c Synced by: Ben Wing, 2-17-10.
@set UPDATED 18 September 2008
@set UPDATED-MONTH September 2008
@set EDITION 4.13
@set VERSION 4.13