style: update clang-format

Author: codejsha

coding-test-cpp-practice/.clang-format

@@ -1,4 +1,5 @@
 ---
+# @formatter:off
 Language:        Cpp
 # BasedOnStyle:  LLVM
 AccessModifierOffset: -4
@@ -213,7 +214,7 @@ StatementAttributeLikeMacros:
 StatementMacros:
   - Q_UNUSED
   - QT_REQUIRE_VERSION
-TabWidth:        8
+TabWidth:        4
 UseTab:          Never
 WhitespaceSensitiveMacros:
   - BOOST_PP_STRINGIZE