preproc: add %un[i]macro, add cleanups

Add %un[i]macro, and a few stylistic cleanups.

Note: unlike %undef, %un[i]macro takes an argument specification,
which must *exactly* match the macro being undefined.  Similarly,
%unimacro has to be used to undefine a macro defined with %imacro, and
vice versa.

1 files changed, 2 insertions, 0 deletions

diff --git a/pptok.dat b/pptok.dat
index aa1af8a..982fc44 100644
--- a/pptok.dat
+++ b/pptok.dat
@@ -48,6 +48,8 @@
 %strlen
 %substr
 %undef
+%unimacro
+%unmacro
 %use
 %warning
 %xdefine