wrapper.c: add and use fopen_or_warn()

diff --git a/Documentation/git-status.txt b/Documentation/git-status.txt
index ba873657cf2f9d139d2ddb7c19e6865cc159a64d..d70abc6afe3aa40aaaab2e055ee75d8ee22cdb69 100644 (file)
--- a/Documentation/git-status.txt
+++ b/Documentation/git-status.txt
@@ -181,6 +181,17 @@ in which case `XY` are `!!`.
     !           !    ignored
     -------------------------------------------------
 
+Submodules have more state and instead report
+               M    the submodule has a different HEAD than
+                    recorded in the index
+               m    the submodule has modified content
+               ?    the submodule has untracked files
+since modified content or untracked files in a submodule cannot be added
+via `git add` in the superproject to prepare a commit.
+
+'m' and '?' are applied recursively. For example if a nested submodule
+in a submodule contains an untracked file, this is reported as '?' as well.
+
 If -b is used the short-format status is preceded by a line
 
     ## branchname tracking info
@@ -210,6 +221,8 @@ field from the first filename).  Third, filenames containing special
 characters are not specially formatted; no quoting or
 backslash-escaping is performed.
 
+Any submodule changes are reported as modified `M` instead of `m` or single `?`.
+
 Porcelain Format Version 2
 ~~~~~~~~~~~~~~~~~~~~~~~~~~