Compatibility note about `Ta' being a line macro.

1 files changed, 5 insertions, 0 deletions

diff --git a/mdoc.7 b/mdoc.7
index cf88887f..5d7d70c1 100644
--- a/mdoc.7
+++ b/mdoc.7
@@ -1989,6 +1989,11 @@ Heirloom troff, the other significant troff implementation accepting
 .Pp
 .Bl -dash -compact
 .It
+groff does not accept the
+.Sq \&Ta
+pseudo-macro as a line macro.
+mandoc does.
+.It
 The comment syntax
 .Sq \e."
 is no longer accepted.