t1404: document function test_update_rejected

diff --git a/Documentation/gitcredentials.txt b/Documentation/gitcredentials.txt
index 1c75be080368a5975b609cd8b902d224eabc9bd8..f3a75d1ce1c5a2709b452faca76f5f6f1cdb7de0 100644 (file)
--- a/Documentation/gitcredentials.txt
+++ b/Documentation/gitcredentials.txt
@@ -106,6 +106,11 @@ variable, each helper will be tried in turn, and may provide a username,
 password, or nothing. Once Git has acquired both a username and a
 password, no more helpers will be tried.
 
+If `credential.helper` is configured to the empty string, this resets
+the helper list to empty (so you may override a helper set by a
+lower-priority config file by configuring the empty-string helper,
+followed by whatever set of helpers you would like).
+
 
 CREDENTIAL CONTEXTS
 -------------------