[PATCH v2 3/5] doc: config: document --[no-]value

From: Kristoffer Haugsbakk <redacted>

These options were introduced in a series of commits from
fe3ccc7aab (Merge branch 'ps/config-subcommands', 2024-05-15).[1]
But they were not documented here.

Document this option and the negated form according to the current
convention.[2]

[1]: `--value` is a replacement for the `value-pattern`
    positional argument
[2]: https://lore.kernel.org/git/xmqqcyct1mtq.fsf@gitster.g/ (local)

Acked-by: Patrick Steinhardt <redacted>
Signed-off-by: Kristoffer Haugsbakk <redacted>
---
 Documentation/git-config.adoc | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/Documentation/git-config.adoc b/Documentation/git-config.adoc
index d3ddc538555..03808b18d3e 100644
--- a/Documentation/git-config.adoc
+++ b/Documentation/git-config.adoc

@@ -200,6 +200,14 @@ See also <<FILES>>.
 	section in linkgit:gitrevisions[7] for a more complete list of
 	ways to spell blob names.
 
+`--value=<pattern>`::
+`--no-value`::
+	With `get`, `set`, and `unset`, match only against
+	_<pattern>_. The pattern is an extended regular expression unless
+	`--fixed-value` is given.
++
+Use `--no-value` to unset _<pattern>_.
+
 --fixed-value::
 	When used with the `value-pattern` argument, treat `value-pattern` as
 	an exact string instead of a regular expression. This will restrict

-- 
2.50.0.136.g303b50f9132