clang-format: [JS] Keep space after closure style comments.

Before:
  var x = /** @type {foo} */ (bar);

After:
  var x = /** @type {foo} */(bar);

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@208093 91177308-0d34-0410-b5e6-96231b3b80d8