Update the documentation of the raw diff output format

diff --git a/mktag.c b/mktag.c
index 99a356e9ee75cb247d80ed6dc0b251ceb0bd9e46..a609e3ebd106ed985fa2065dc4af6565e5a379a6 100644 (file)
--- a/mktag.c
+++ b/mktag.c
@@ -165,7 +165,7 @@ int main(int argc, char **argv)
        setup_git_directory();
 
        if (strbuf_read(&buf, 0, 4096) < 0) {
-               die("could not read from stdin");
+               die_errno("could not read from stdin");
        }
 
        /* Verify it for some basic sanity: it needs to start with