Mostly path name updates
diff --git a/man/man1/diff.1 b/man/man1/diff.1
index 404c74f..c1b5e84 100644
--- a/man/man1/diff.1
+++ b/man/man1/diff.1
@@ -130,7 +130,7 @@
 .SH FILES
 .B /tmp/diff[12]
 .SH SOURCE
-.B /sys/src/cmd/diff
+.B /usr/local/plan9/src/cmd/diff
 .SH "SEE ALSO"
 .IR cmp (1),
 .IR comm (1),