update-index: do not die too early in a read-only repository.

diff --git a/Documentation/tutorial.txt b/Documentation/tutorial.txt
index 5fc5be5a287c5ac9e12ac8111cb9434f3c5d3d03..129c5c5f5b8657175db7efed2c06078affd05ab6 100644 (file)
--- a/Documentation/tutorial.txt
+++ b/Documentation/tutorial.txt
@@ -461,6 +461,8 @@ this branch.  If this branch is the only branch containing those
 commits, they will be lost.  Also, don't use "git reset" on a
 publicly-visible branch that other developers pull from, as it will
 force needless merges on other developers to clean up the history.
+If you need to undo changes that you have pushed, use gitlink:git-revert[1]
+instead.
 
 The git grep command can search for strings in any version of your
 project, so