Correct some manpage formatting glitches

diff -ur pkg-config-0.23.orig/pkg-config.1 pkg-config-0.23/pkg-config.1
--- pkg-config-0.23.orig/pkg-config.1	2008-01-16 22:26:50.000000000 +0100
+++ pkg-config-0.23/pkg-config.1	2008-10-13 10:10:12.000000000 +0200
@@ -313,11 +313,13 @@
 PKG_CHECK_MODULES might not happen, you should be sure to include an
 explicit call to PKG_PROG_PKG_CONFIG in your configure.ac
 
+.TP
 .I "PKG_PROG_PKG_CONFIG([MIN-VERSION])"
 
 Defines the PKG_CONFIG variable to the best pkg-config available,
 useful if you need pkg-config but don't want to use PKG_CHECK_MODULES.
 
+.TP
 .I "PKG_CHECK_EXISTS(MODULES, [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])"
 
 Check to see whether a particular set of modules exists.  Similar