Moved sanity check in lfs_format after compaction

After a bit of tweaking in 9dde5c7 to write out all superblocks
during lfs_format, additional writes were added after the sanity
checking normally done at the end.

This turned out to be a problem when porting littlefs, as it makes it
easy for addressing issues to not get caught during lfs_format.

Found by marekr, tristanclare94, and mjs513

lfs.c

@@ -3616,12 +3616,6 @@ static int lfs_rawformat(lfs_t *lfs, const struct lfs_config *cfg) {
             goto cleanup;
         }
 
-        // sanity check that fetch works
-        err = lfs_dir_fetch(lfs, &root, (const lfs_block_t[2]){0, 1});
-        if (err) {
-            goto cleanup;
-        }
-
         // force compaction to prevent accidentally mounting any
         // older version of littlefs that may live on disk
         root.erased = false;
@@ -3629,6 +3623,12 @@ static int lfs_rawformat(lfs_t *lfs, const struct lfs_config *cfg) {
         if (err) {
             goto cleanup;
         }
+
+        // sanity check that fetch works
+        err = lfs_dir_fetch(lfs, &root, (const lfs_block_t[2]){0, 1});
+        if (err) {
+            goto cleanup;
+        }
     }
 
 cleanup:

scripts/test.py

@@ -746,9 +746,9 @@ if __name__ == "__main__":
     parser.add_argument('testpaths', nargs='*', default=[TESTDIR],
         help="Description of test(s) to run. By default, this is all tests \
             found in the \"{0}\" directory. Here, you can specify a different \
-            directory of tests, a specific file, a suite by name, and even \
-            specific test cases and permutations. For example \
-            \"test_dirs#1\" or \"{0}/test_dirs.toml#1#1\".".format(TESTDIR))
+            directory of tests, a specific file, a suite by name, and even a \
+            specific test case by adding brackets. For example \
+            \"test_dirs[0]\" or \"{0}/test_dirs.toml[0]\".".format(TESTDIR))
     parser.add_argument('-D', action='append', default=[],
         help="Overriding parameter definitions.")
     parser.add_argument('-v', '--verbose', action='store_true',