[groff] 01/23: groff(1), troff(1): Document operand handling.

[G. Branden Robinson]

gbranden pushed a commit to branch master
in repository groff.

commit 76d816e05295e64bdf500ac4cadaccfe69f655cb
Author: G. Branden Robinson <g.branden.robinson@gmail.com>
AuthorDate: Thu May 4 12:56:32 2023 -0500

    groff(1), troff(1): Document operand handling.
---
 src/roff/groff/groff.1.man |  9 +++++++++
 src/roff/troff/troff.1.man | 15 ++++++++++++++-
 2 files changed, 23 insertions(+), 1 deletion(-)

diff --git a/src/roff/groff/groff.1.man b/src/roff/groff/groff.1.man
index 0873e175a..0314197ad 100644
--- a/src/roff/groff/groff.1.man
+++ b/src/roff/groff/groff.1.man
@@ -142,6 +142,15 @@ or user-defined macros.
 .
 All three approaches can be combined.
 .
+If no
+.I file
+operands are given on the command line,
+or if
+.I file
+is
+.RB \[lq] \- \[rq],
+the standard input stream is read.
+.
 .
 .P
 A reimplementation and extension of the typesetter from AT&T Unix,
diff --git a/src/roff/troff/troff.1.man b/src/roff/troff/troff.1.man
index 2ab12b969..36e6d53f5 100644
--- a/src/roff/troff/troff.1.man
+++ b/src/roff/troff/troff.1.man
@@ -112,7 +112,20 @@ is thus the heart of the GNU
 .I roff
 document formatting system.
 .
-It is functionally compatible with the AT&T
+If no
+.I file
+operands are given on the command line,
+or if
+.I file
+is
+.RB \[lq] \- \[rq],
+the standard input stream is read.
+.
+.
+.P
+GNU
+.I troff \" GNU
+is functionally compatible with the AT&T
 .I troff \" AT&T
 typesetter and features numerous extensions.
 .