add a style message about overlong text lines,

trying very hard to avoid false positives,
not at all trying to catch as many cases as possible;

feature originally suggested by tb@,
OK tb@ kn@ jmc@

1 files changed, 3 insertions, 0 deletions

diff --git a/mandoc.1 b/mandoc.1
index 7bd0911a..e9d4e1aa 100644
--- a/mandoc.1
+++ b/mandoc.1
@@ -1066,6 +1066,9 @@ An
 request occurs even though the document already switched to no-fill mode
 and did not switch back to fill mode yet.
 It has no effect.
+.It Sy "input text line longer than 80 bytes"
+Consider breaking the input text line
+at one of the blank characters before column 80.
 .It Sy "verbatim \(dq--\(dq, maybe consider using \e(em"
 .Pq mdoc
 Even though the ASCII output device renders an em-dash as