Align the hyphens in .PL.

diff --git a/doc/Guidebook.mn b/doc/Guidebook.mn
index d7ab1b58dc3c8657284f6b4c653f34ff62c1ba0d..01e54678a867e28b3ad219074ce5d5ef389a8868 100644 (file)
--- a/doc/Guidebook.mn
+++ b/doc/Guidebook.mn
@@ -15,7 +15,8 @@
 .\" .PE
 .\"    clean up
 .de PS
-.nr PY \\w'\\$1\ -\ 'u                 \" width of label plus " - " for line 1
+.nr PY \\w'\\$1\ -\ 'u                 \" width of label plus " - "
+.nr PX \\w'\ -\ 'u                     \" width of " - "
 .sn \\n(pdu                            \" tmac.n: inter-paragraph space
 .in +\\n(PYu                           \" additional indent past label (etc)
 .si                                    \" tmac.n: start indented section
@@ -23,11 +24,12 @@
 .\" labeled paragraph label (and first line)
 .de PL
 .br
-\\h'|-\\n(PYu'\\$1\ -\ \\h'|0u'\\c     \" back up, output the label, then
-.                                      \" output the " - " and skip back to
-.                                      \" a zero indent; then attach
-.                                      \" the next line (the text) without
-.                                      \" stopping(\c: nroff section 4.2)
+\\h'|-\\n(PYu'\\$1\\h'|-\\n(PXu'\ -\ \\c \" back up, output the label, then
+.                                      \" skip to width-of(" - ") before the
+.                                      \" normal indentation, output the " - " 
+.                                      \" then attach the next line (the
+.                                      \" text) without stopping (\c: nroff
+.                                      \" section 4.2)
 ..
 .\"labeled paragraph end
 .de PE