[groff] 08/14: [docs]: Clarify behavior of `F` operator.

[G. Branden Robinson]

gbranden pushed a commit to branch master
in repository groff.

commit 94958a28ff1a183fe1e6805073f12fc78763641e
Author: G. Branden Robinson <g.branden.robinson@gmail.com>
AuthorDate: Sun Apr 21 16:12:43 2024 -0500

    [docs]: Clarify behavior of `F` operator.
    
    ...in conditional expressions.
    
    Sync groff_diff(7) with our Texinfo manual.
---
 doc/groff.texi.in    | 5 +++--
 man/groff_diff.7.man | 6 +++---
 2 files changed, 6 insertions(+), 5 deletions(-)

diff --git a/doc/groff.texi.in b/doc/groff.texi.in
index a0d14bbc6..d39637d26 100644
--- a/doc/groff.texi.in
+++ b/doc/groff.texi.in
@@ -12928,8 +12928,9 @@ True if the current page is even-numbered.
 
 @item F @var{font}
 True if @var{font} exists.  @var{font} is handled as if it were an
-argument to the @code{ft} request (that is, font translation and styles
-are applied), but it is not mounted.
+argument to the @code{ft} request (that is, the default family is
+combined with an abstract style and font translation is applied), but
+@var{font} cannot be a mounting position, and no font is mounted.
 
 @item m @var{color}
 True if @var{color} is defined.
diff --git a/man/groff_diff.7.man b/man/groff_diff.7.man
index b997b7f7e..d4937f82f 100644
--- a/man/groff_diff.7.man
+++ b/man/groff_diff.7.man
@@ -578,12 +578,12 @@ can be an abstract style
 or a font name.
 .
 .I fnt
-is handled as if it
-were accessed with the
+is handled as if it were an argument to the
 .B ft
 request
 (that is,
-abstract styles are resolved and font translations applied),
+the default family is combined with an abstract style and font
+translation is applied),
 but
 .I fnt
 cannot be a mounting position,