[groff] 06/06: doc/groff.texi: Clarify when a diversion exists.

[G. Branden Robinson]

gbranden pushed a commit to branch master
in repository groff.

commit d6233acfd51a93d308a243ad73e568df36a5f53e
Author: G. Branden Robinson <g.branden.robinson@gmail.com>
AuthorDate: Tue Feb 23 11:13:26 2021 +1100

    doc/groff.texi: Clarify when a diversion exists.
---
 doc/groff.texi | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/doc/groff.texi b/doc/groff.texi
index 1d91cf5..196576c 100644
--- a/doc/groff.texi
+++ b/doc/groff.texi
@@ -13544,10 +13544,13 @@ For orthogonality it is said that GNU @code{troff} is 
in the
 @dfn{top-level diversion} if no diversion is active (that is, formatted
 output is being ``diverted'' immediately to the output device).
 
-The following requests are used to create and alter diversions;
-dereferencing an undefined diversion will create an empty one of that
-name, and cause a warning of type @samp{mac} to be emitted
-(@pxref{Debugging}).
+Dereferencing an undefined diversion will create an empty one of that
+name and cause a warning of type @samp{mac} to be emitted
+(@pxref{Debugging}).  A diversion does not exist for the purpose of
+testing with the @code{d} conditional operator until it ends
+(@pxref{Operators in Conditionals}).  The @code{.z} register can be used
+to test the identity of the current diversion.  The following requests
+are used to create and alter diversions.
 
 @DefreqList {di, macro}
 @DefreqListEndx {da, macro}