record: do not include files into changes count
This turns the prompt sequence from something like:
$ examine changes to foo?
$ record change 1/4 to foo?
$ record change 2/4 to foo?
$ examine changes to bar?
$ record change 4/4 to bar?
into:
$ examine changes to foo?
$ record change 1/3 to foo?
$ record change 2/3 to foo?
$ examine change to bar?
$ record change 3/3 to bar?
$ hg init
$ python -c 'print "confuse str.splitlines\nembedded\rnewline"' > a
$ hg ci -Ama -d '1 0'
adding a
$ echo clean diff >> a
$ hg ci -mb -d '2 0'
$ hg diff -r0 -r1
diff -r 107ba6f817b5 -r 310ce7989cdc a
--- a/a Thu Jan 01 00:00:01 1970 +0000
+++ b/a Thu Jan 01 00:00:02 1970 +0000
@@ -1,2 +1,3 @@
confuse str.splitlines
embedded\rnewline (esc)
+clean diff