format-patch: document --quiet option

diff --git a/builtin/merge-file.c b/builtin/merge-file.c
index b6664d49be9454b703615af4e71f92231e053e07..237abd3c0b27b601aca140bfb67a302666ff9cf2 100644 (file)
--- a/builtin/merge-file.c
+++ b/builtin/merge-file.c
@@ -28,6 +28,7 @@ int cmd_merge_file(int argc, const char **argv, const char *prefix)
        xmparam_t xmp = {{0}};
        int ret = 0, i = 0, to_stdout = 0;
        int quiet = 0;
+       int prefixlen = 0;
        struct option options[] = {
                OPT_BOOLEAN('p', "stdout", &to_stdout, "send results to standard output"),
                OPT_SET_INT(0, "diff3", &xmp.style, "use a diff3 based merge", XDL_MERGE_DIFF3),
@@ -39,7 +40,7 @@ int cmd_merge_file(int argc, const char **argv, const char *prefix)
                            XDL_MERGE_FAVOR_UNION),
                OPT_INTEGER(0, "marker-size", &xmp.marker_size,
                            "for conflicts, use this marker size"),
-               OPT__QUIET(&quiet),
+               OPT__QUIET(&quiet, "do not warn about conflicts"),
                OPT_CALLBACK('L', NULL, names, "name",
                             "set labels for file1/orig_file/file2", &label_cb),
                OPT_END(),
@@ -65,10 +66,14 @@ int cmd_merge_file(int argc, const char **argv, const char *prefix)
                                     "%s\n", strerror(errno));
        }
 
+       if (prefix)
+               prefixlen = strlen(prefix);
+
        for (i = 0; i < 3; i++) {
+               const char *fname = prefix_filename(prefix, prefixlen, argv[i]);
                if (!names[i])
                        names[i] = argv[i];
-               if (read_mmfile(mmfs + i, argv[i]))
+               if (read_mmfile(mmfs + i, fname))
                        return -1;
                if (buffer_is_binary(mmfs[i].ptr, mmfs[i].size))
                        return error("Cannot merge binary files: %s\n",