history & conflicts idea

[<roger@golem>]

I find it annoying that I can't tell who modified a method last.  This
makes it difficult to tell if its my version or what.  Is there some
good way to put in a per method auto generated comment and history
something like
version 12.3.44.1 on july 14, 1999 by roger Gregory
replaces version 12.3.31 of aug 27 1999 by mumble

note date non conflict!	
there is a big problem with generating the version numbers but
it would be useful even without the version numbers.

Is there a simple way to do this?