runtime(doc): fix inconsistent indent (#14089)

Signed-off-by: zeertzjq <zeertzjq@outlook.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/runtime/doc/ft_ada.txt b/runtime/doc/ft_ada.txt
index 80ed728..35dd534 100644
--- a/runtime/doc/ft_ada.txt
+++ b/runtime/doc/ft_ada.txt
@@ -172,7 +172,7 @@
 							       *g:gnat.Make()*
 g:gnat.Make()
 		Calls |g:gnat.Make_Command| and displays the result inside a
-               |quickfix| window.
+		|quickfix| window.
 
 							     *g:gnat.Pretty()*
 g:gnat.Pretty()