user-manual: use pithier example commit

diff --git a/Documentation/git-update-index.txt b/Documentation/git-update-index.txt
index d043e86a776897d4ec5b6515e3cf70d89fa8a97c..6cfbd9a842f0601cf81f8780ecf6b7939b25dccb 100644 (file)
--- a/Documentation/git-update-index.txt
+++ b/Documentation/git-update-index.txt
@@ -3,7 +3,7 @@ git-update-index(1)
 
 NAME
 ----
-git-update-index - Modifies the index or directory cache
+git-update-index - Register file contents in the working tree to the index
 
 
 SYNOPSIS
@@ -15,7 +15,7 @@ SYNOPSIS
             [--cacheinfo <mode> <object> <file>]\*
             [--chmod=(+|-)x]
             [--assume-unchanged | --no-assume-unchanged]
-            [--really-refresh] [--unresolve] [--again]
+            [--really-refresh] [--unresolve] [--again | -g]
             [--info-only] [--index-info]
             [-z] [--stdin]
             [--verbose]
@@ -27,6 +27,9 @@ Modifies the index or directory cache. Each file mentioned is updated
 into the index and any 'unmerged' or 'needs updating' state is
 cleared.
 
+See also gitlink:git-add[1] for a more user-friendly way to do some of
+the most common operations on the index.
+
 The way "git-update-index" handles files it is told about can be modified
 using the various options:
 
@@ -40,7 +43,7 @@ OPTIONS
 --remove::
        If a specified file is in the index but is missing then it's
        removed.
-       Default behaviour is to ignore removed file.
+       Default behavior is to ignore removed file.
 
 --refresh::
        Looks at the current index and checks to see if merges or
@@ -80,7 +83,7 @@ OPTIONS
        filesystem that has very slow lstat(2) system call
        (e.g. cifs).
 
---again::
+--again, -g::
        Runs `git-update-index` itself on the paths whose index
        entries are different from those from the `HEAD` commit.
 
@@ -216,8 +219,8 @@ $ git ls-files -s
 ------------
 
 
-Using "assume unchanged" bit
-----------------------------
+Using ``assume unchanged'' bit
+------------------------------
 
 Many operations in git depend on your filesystem to have an
 efficient `lstat(2)` implementation, so that `st_mtime`
@@ -289,19 +292,25 @@ Configuration
 
 The command honors `core.filemode` configuration variable.  If
 your repository is on an filesystem whose executable bits are
-unreliable, this should be set to 'false' (see gitlink:git-repo-config[1]).
+unreliable, this should be set to 'false' (see gitlink:git-config[1]).
 This causes the command to ignore differences in file modes recorded
 in the index and the file mode on the filesystem if they differ only on
 executable bit.   On such an unfortunate filesystem, you may
 need to use `git-update-index --chmod=`.
 
+Quite similarly, if `core.symlinks` configuration variable is set
+to 'false' (see gitlink:git-config[1]), symbolic links are checked out
+as plain files, and this command does not modify a recorded file mode
+from symbolic link to regular file.
+
 The command looks at `core.ignorestat` configuration variable.  See
 'Using "assume unchanged" bit' section above.
 
 
 See Also
 --------
-gitlink:git-repo-config[1]
+gitlink:git-config[1],
+gitlink:git-add[1]
 
 
 Author