clang-format: [JS] Fix spacing in destructuring assignments.

Before:
  const[a, b, c] = [1, 2, 3];

After:
  const [a, b, c] = [1, 2, 3];

llvm-svn: 270029
diff --git a/clang/unittests/Format/FormatTestJS.cpp b/clang/unittests/Format/FormatTestJS.cpp
index 485e822..5f60f1d 100644
--- a/clang/unittests/Format/FormatTestJS.cpp
+++ b/clang/unittests/Format/FormatTestJS.cpp
@@ -148,6 +148,7 @@
 
 TEST_F(FormatTestJS, ES6DestructuringAssignment) {
   verifyFormat("var [a, b, c] = [1, 2, 3];");
+  verifyFormat("const [a, b, c] = [1, 2, 3];");
   verifyFormat("let [a, b, c] = [1, 2, 3];");
   verifyFormat("var {a, b} = {a: 1, b: 2};");
   verifyFormat("let {a, b} = {a: 1, b: 2};");