Fix the linting problems in UnsafeBufferUsage.cpp

Fix the linting problems which causes `clang/utils/ci/run-buildbot check-format` to return 1.

Also make a correction for the email address of the author of
0fd4175:

  The correct email address is "ar.ashouri999@gmail.com", not "ar.ashouri999@google.com".

Reviewed by: ziqingluo-90 (Ziqing Luo)

Differential revision: https://reviews.llvm.org/D155814

clang/lib/Analysis/UnsafeBufferUsage.cpp

@@ -2267,7 +2267,6 @@ void clang::checkUnsafeBufferUsage(const Decl *D,
 #endif
 
   assert(D && D->getBody());
-
   // We do not want to visit a Lambda expression defined inside a method independently.
   // Instead, it should be visited along with the outer method.
   if (const auto *fd = dyn_cast<CXXMethodDecl>(D)) {