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, 14 insertions, 14 deletions

diff --git a/man/man3/subfont.3 b/man/man3/subfont.3
index 5e1b09ab..e321b7da 100644
--- a/man/man3/subfont.3
+++ b/man/man3/subfont.3
@@ -53,13 +53,13 @@ Font*	mkfont(Subfont *f, Rune min)
 .SH DESCRIPTION
 Subfonts are the components of fonts that hold the character images.
 A font comprises an array of subfonts; see
-.IR cachechars (3).
+.IM cachechars (3) .
 A new
 .B Subfont
 is allocated and initialized with
 .IR allocsubfont .
 See
-.IR cachechars (3)
+.IM cachechars (3)
 for the meaning of
 .IR n ,
 .IR height ,
@@ -81,7 +81,7 @@ The appropriate fields of the returned
 structure are set to
 the passed arguments, and the image is registered as a subfont
 with the graphics device
-.IR draw (3).
+.IM draw (3) .
 .I Allocsubfont
 returns 0 on failure.
 .PP
@@ -97,7 +97,7 @@ on
 if
 .B f->info
 was not allocated by
-.IR malloc (3)
+.IM malloc (3)
 it should be zeroed before calling
 .IR subffree .
 .PP
@@ -150,7 +150,7 @@ Although it is principally a routine internal to the library,
 may be substituted by the application to provide a less file-oriented subfont naming scheme.
 .PP
 The format of a subfont file is described in
-.IR font (7).
+.IM font (7) .
 Briefly, it contains a image with all the characters in it,
 followed by a subfont header, followed by character information.
 .I Readsubfont
@@ -181,13 +181,13 @@ the part of a subfont file that comes after the image.  It should be preceded by
 a call to
 .IR writeimage
 (see
-.IR allocimage (3)).
+.IM allocimage (3) ).
 .PP
 .I Stringsubfont
 is analogous to
 .B string
 (see
-.IR draw (3))
+.IM draw (3) )
 for subfonts.  Rather than use the underlying font caching primitives,
 it calls
 .B draw
@@ -224,12 +224,12 @@ bitmap font file tree
 .SH SOURCE
 .B \*9/src/libdraw
 .SH SEE ALSO
-.IR graphics (3),
-.IR allocimage (3),
-.IR draw (3),
-.IR cachechars (3),
-.IR image (7),
-.IR font (7)
+.IM graphics (3) ,
+.IM allocimage (3) ,
+.IM draw (3) ,
+.IM cachechars (3) ,
+.IM image (7) ,
+.IM font (7)
 .SH DIAGNOSTICS
 All of the functions use the graphics error function (see
-.IR graphics (3)).
+.IM graphics (3) ).