tmac: introduce real manual reference macro instead of overloading IR

The overloading of IR emits magic \X'...' sequences that turn into HTML manual links.
But not all such IR invocations should be manual links;
those had to be written to avoid the IR macro before.
Worse, the \X'...' ending the IR causes troff to emit only a single space after a period.

Defining a new IM macro for manual references fixes both problems.

Fixes #441.

1 files changed, 9 insertions, 9 deletions

diff --git a/man/man7/mhtml.7 b/man/man7/mhtml.7
index dcf49868..95439641 100644
--- a/man/man7/mhtml.7
+++ b/man/man7/mhtml.7
@@ -19,14 +19,14 @@ mhtml \- macros for formatting HTML
 \&...
 .SH DESCRIPTION
 This package of
-.IR htmlroff (1)
+.IM htmlroff (1)
 macro definitions provides convenient macros for formatting HTML.
 It is usually used along with 
-.IR troff (1)
+.IM troff (1)
 macro packages such as
-.IR man (7)
+.IM man (7)
 and
-.IR ms (7).
+.IM ms (7) .
 .I Mhtml
 replaces some macros defined in the other packages,
 so it should be listed after them on the
@@ -64,7 +64,7 @@ before invoking
 Accumulate footnotes and print them at the end of the
 document under a \fBNotes\fP heading.
 These replace the macros in
-.IR ms (7).
+.IM ms (7) .
 To emit the notes accumulated so far, invoke
 .BR .NOTES .
 .TP
@@ -75,7 +75,7 @@ and
 .B .PE
 with a PNG image corresponding to the output of
 running
-.IR troff (1)
+.IM troff (1)
 on the input.
 .TP
 .B .TS\fR, \fP.TE
@@ -100,6 +100,6 @@ percent of the current output width.
 .SH FILES
 .B \*9/tmac/tmac.html
 .SH  SEE ALSO
-.IR htmlroff (1),
-.IR htmlroff (7),
-.IR ms (7)
+.IM htmlroff (1) ,
+.IM htmlroff (7) ,
+.IM ms (7)