acme(4): correct description of addr file
 [rsc] --rw-rw-r-- M 467740 glenda sys 10392 Mar 12 09:14 sys/man/4/acme
	/n/sourcesdump/2006/0312/plan9/sys/man/4/acme:147,164 - 
	/n/sourcesdump/2006/0313/plan9/sys/man/4/acme:147,166
	  When read, it returns the value of the address that would next be read
	  or written through the
	  .B data
	- file, in the format
	- .BI # m ,# n
	- where
	+ file, formatted as 2 decimal numbers
	  .I m
	  and
	- .I n
	- are character (not byte) offsets.  If
	- .I m
	+ .IR n ,
	+ each formatted in 11 characters plus a blank.
	+ .I M
	  and
	  .I n
	- are identical, the format is just
	- .BI # m\f1.
	+ are the character (not byte) offsets of the
	+ beginning and end of the address, 
	+ which would be expressed in
	+ .I acme 's
	+ input language as 
	+ .BI # m ,# n \fR.
	  Thus a regular expression may be evaluated by writing it to
	  .B addr
	  and reading it back.