ox-html.el (org-html-section): Fix indentation

* ox-html.el (org-html-section): Fix indentation.

lisp/ox-html.el

@@ -2560,8 +2560,8 @@ holding contextual information."
 	       'number-to-string
 	       (org-export-get-headline-number parent info) "-")))
         ;; Build return value.
-        (format "<div class=\"outline-text-%d\" id=\"text-%s\">\n%s</div>"
-                class-num
+	(format "<div class=\"outline-text-%d\" id=\"text-%s\">\n%s</div>"
+		class-num
 		(or (org-element-property :CUSTOM_ID parent) section-number)
 		contents)))))