wmemcmp.3, issue.5, motd.5: Convert inline formatting (\fX...\fP) to dot-directive formatting

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

man3/wmemcmp.3

@@ -59,11 +59,14 @@ is greater than
 It returns an integer less than zero if
 at the first differing position
 .I i
-(\fIi\fP <
+.RI ( i
+<
 .IR n ),
 the corresponding
-wide-character \fIs1[i]\fP is less than
-\fIs2[i]\fP.
+wide-character
+.I s1[i]
+is less than
+.IR s2[i] .
 .SH CONFORMING TO
 C99.
 .SH SEE ALSO

man5/issue.5

@@ -28,7 +28,9 @@
 .SH NAME
 issue \- prelogin message and identification file
 .SH DESCRIPTION
-The file \fI/etc/issue\fP is a text file which contains a message or
+The file
+.I /etc/issue
+is a text file which contains a message or
 system identification to be printed before the login prompt.
 It may contain various \fB@\fP\fIchar\fP and \fB\e\fP\fIchar\fP
 sequences, if supported by the

man5/motd.5

@@ -28,7 +28,9 @@
 .SH NAME
 motd \- message of the day
 .SH DESCRIPTION
-The contents of \fI/etc/motd\fP are displayed by
+The contents of
+.I /etc/motd
+are displayed by
 .BR login (1)
 after a successful login but just before it executes the login shell.