fix indent size

.clang-format

@@ -13,7 +13,7 @@ BinPackParameters: 'true'
 ColumnLimit: '1000'
 IndentCaseLabels: 'true'
 IndentPPDirectives: AfterHash
-IndentWidth: '2'
+IndentWidth: '4'
 MaxEmptyLinesToKeep: '1'
 PointerAlignment: Right
 SortIncludes: 'false'