use macro for /usr/local/plan9

man/man1/dict.1

@@ -191,14 +191,14 @@ Other files in
 .SH "SEE ALSO"
 .IR regexp (7)
 .SH SOURCE
-.B /usr/local/plan9/src/cmd/dict
+.B \*9/src/cmd/dict
 .br
-.B /usr/local/plan9/bin/adict
+.B \*9/bin/adict
 .SH BUGS
 A font with wide coverage of the Unicode Standard
 should be used for best results.
 (Try
-.BR /usr/local/plan9/font/pelm/unicode.9.font .)
+.BR \*9/font/pelm/unicode.9.font .)
 .PP
 If the
 .I pattern
@@ -207,6 +207,6 @@ a few literal characters, matching takes a long time.
 .PP
 The dictionaries are not distributed outside Bell Labs,
 though see
-.B /usr/local/plan9/dict/README
+.B \*9/dict/README
 for information on using free dictionaries prepared
 by Project Gutenberg.