Turn 8 spaces to tab across the project

According to the current code style of the project

src/hb-ot-layout-gpos-table.hh

@@ -513,10 +513,7 @@ struct SinglePosFormat1
     auto vals = hb_second (*it);
 
     + vals
-    | hb_apply ([=] (const Value& _)
-                {
-                  c->copy (_);
-                })
+    | hb_apply ([=] (const Value& _) { c->copy (_); })
     ;
 
     auto glyphs =
@@ -613,10 +610,7 @@ struct SinglePosFormat2
     | hb_apply ([=] (hb_array_t<const Value> val_iter)
 		{
 		  + val_iter
-                  | hb_apply ([=] (const Value& _)
-                              {
-                                c->copy (_);
-                              })
+		  | hb_apply ([=] (const Value& _) { c->copy (_); })
 		  ;
 		})
     ;