From 93dd1a09d574322c577d2036ae89ef1269376d08 Mon Sep 17 00:00:00 2001
From: "G. Branden Robinson" <g.branden.robinson@gmail.com>
Date: Sun, 5 Nov 2023 15:44:06 -0600
Subject: [PATCH] doc/Guidebook.mn: Improve roff character reference

And point people to a more authoritative reference.
---
 doc/Guidebook.mn | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/doc/Guidebook.mn b/doc/Guidebook.mn
index 6814699fb..495f2a0c6 100644
--- a/doc/Guidebook.mn
+++ b/doc/Guidebook.mn
@@ -48,9 +48,11 @@
 .\" \(oq = left (open) single quote
 .\" \(cq = right (close) single quote    \(aq = apostrophe / single quote
 .\"    - = hyphen                        \-   = minus sign
-.\"                                      \(em = M-sized dash
+.\" \(rs = backslash                     \(em = dash as wide as 'M' is tall
 .\"    ^ = small circumflex punctuation  \(ha = larger circumflex character
 .\"    ~ = small tilde punctuation       \(ti = larger tilde character
+.\"
+.\" See groff_man_style(7) or groff_char(7) for more on these.
 .
 .
 .\" finally, start the actual Guidebook...