credential: let helpers tell us to quit

diff --git a/Documentation/git-check-ref-format.txt b/Documentation/git-check-ref-format.txt
index ec1739a896074c96bd94603592ca72bcee0b927f..fc02959ba4ab1ae6acc3dc5f707e870e42144f1c 100644 (file)
--- a/Documentation/git-check-ref-format.txt
+++ b/Documentation/git-check-ref-format.txt
@@ -54,6 +54,8 @@ Git imposes the following rules on how references are named:
 
 . They cannot contain a sequence `@{`.
 
+. They cannot be the single character `@`.
+
 . They cannot contain a `\`.
 
 These rules make it easy for shell script based tools to parse
@@ -83,8 +85,7 @@ typed the branch name.
 
 OPTIONS
 -------
---allow-onelevel::
---no-allow-onelevel::
+--[no-]allow-onelevel::
        Controls whether one-level refnames are accepted (i.e.,
        refnames that do not contain multiple `/`-separated
        components).  The default is `--no-allow-onelevel`.