warn about parentheses in function names after .Fn and .Fo;

particularly useful when converting from other languages to mdoc(7);
feature suggested by bentley@

1 files changed, 8 insertions, 0 deletions

diff --git a/mandoc.1 b/mandoc.1
index fc203c3e..7340a8d2 100644
--- a/mandoc.1
+++ b/mandoc.1
@@ -1120,6 +1120,14 @@ An argument of an
 or
 .Ic \&Fn
 macro contains a comma; it should probably be split into two arguments.
+.It Sy "parenthesis in function name"
+.Pq mdoc
+The first argument of an
+.Ic \&Fc
+or
+.Ic \&Fn
+macro contains an opening or closing parenthesis; that's probably wrong,
+parentheses are added automatically.
 .It Sy "invalid content in Rs block"
 .Pq mdoc
 An