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, 7 insertions, 7 deletions

diff --git a/man/man3/venti-client.3 b/man/man3/venti-client.3
index cc8d14f4..e475ef30 100644
--- a/man/man3/venti-client.3
+++ b/man/man3/venti-client.3
@@ -53,7 +53,7 @@ int	vtping(VtConn *z)
 extern int ventidoublechecksha1;  /* default 1 */
 .SH DESCRIPTION
 These routines execute the client side of the 
-.IR venti (7)
+.IM venti (7)
 protocol.
 .PP
 .I Vtrpc
@@ -84,7 +84,7 @@ is typically called only indirectly, via
 calls
 .I vtversion
 (see
-.IR venti-conn (3))
+.IM venti-conn (3) )
 and
 .IR vthello ,
 in that order, returning success only
@@ -171,14 +171,14 @@ in the same proc should start separate procs running
 and
 .I vtrecvproc
 as described in
-.IR venti-conn (3).
+.IM venti-conn (3) .
 .SH SOURCE
 .B \*9/src/libventi
 .SH SEE ALSO
-.IR venti (3),
-.IR venti-conn (3),
-.IR venti-packet (3),
-.IR venti (7)
+.IM venti (3) ,
+.IM venti-conn (3) ,
+.IM venti-packet (3) ,
+.IM venti (7)
 .SH DIAGNOSTICS
 .I Vtrpc
 and