yesterday(1): src for diffy
 [rsc] --rw-rw-r-- M 836007 glenda sys 2628 Apr 14 10:01 sys/man/1/yesterday
	/n/sourcesdump/2006/0414/plan9/sys/man/1/yesterday:13,19 - 
	/n/sourcesdump/2006/0415/plan9/sys/man/1/yesterday:13,19
	  ]
	  .I files ...
	  .PP
	- .I diffy
	+ .B diffy
	  [
	  .B -abcefmnrw
	  ]
	/n/sourcesdump/2006/0414/plan9/sys/man/1/yesterday:145,150 - 
	/n/sourcesdump/2006/0415/plan9/sys/man/1/yesterday:145,152
	  .B /n/dump
	  .SH SOURCE
	  .B /rc/bin/yesterday
	+ .br
	+ .B /rc/bin/diffy
	  .SH SEE ALSO
	  .IR history (1),
	  .IR bind (1),