Fix indent argument parsing

qq88976321 · qq88976321 · commit 5e477fd15118 · 2022-05-03T00:49:35.000+08:00
diff --git a/gh-md-toc b/gh-md-toc
@@ -349,7 +349,7 @@ gh_toc_app() {
 
     if [ "$1" = '--indent' ]; then
         indent="$2"
-        shift
+        shift 2
     fi
 
     if [ "$1" = "-" ]; then
