Check for IO errors after running a command

diff --git a/Documentation/git-submodule.txt b/Documentation/git-submodule.txt
index cb0424f77b41deed3c93f1e34dc48497bf687fce..f8fb80f18b91fc7a7044da261e54ef25988ced99 100644 (file)
--- a/Documentation/git-submodule.txt
+++ b/Documentation/git-submodule.txt
@@ -23,15 +23,15 @@ status::
        repository. This command is the default command for git-submodule.
 
 init::
-       Initialize the submodules, i.e. clone the git repositories specified
-       in the .gitmodules file and checkout the submodule commits specified
-       in the index of the containing repository. This will make the
-       submodules HEAD be detached.
+       Initialize the submodules, i.e. register in .git/config each submodule
+       path and url found in .gitmodules. The key used in git/config is
+       `submodule.$path.url`. This command does not alter existing information
+       in .git/config.
 
 update::
-       Update the initialized submodules, i.e. checkout the submodule commits
-       specified in the index of the containing repository. This will make
-       the submodules HEAD be detached.
+       Update the registered submodules, i.e. clone missing submodules and
+       checkout the commit specified in the index of the containing repository.
+       This will make the submodules HEAD be detached.
 
 
 OPTIONS
@@ -50,7 +50,7 @@ OPTIONS
 
 FILES
 -----
-When cloning submodules, a .gitmodules file in the top-level directory
+When initializing submodules, a .gitmodules file in the top-level directory
 of the containing repository is used to find the url of each submodule.
 This file should be formatted in the same way as $GIR_DIR/config. The key
 to each submodule url is "module.$path.url".