clang-format: [JS] Fix templated parameter default values.

Parameters can have templated types and default values (= ...), which is
another location in which a template closer should be followed by
whitespace.

Patch by Martin Probst, thank you.

llvm-svn: 236382
diff --git a/clang/unittests/Format/FormatTestJS.cpp b/clang/unittests/Format/FormatTestJS.cpp
index 695bad55..e0719ee 100644
--- a/clang/unittests/Format/FormatTestJS.cpp
+++ b/clang/unittests/Format/FormatTestJS.cpp
@@ -687,6 +687,8 @@
   verifyFormat("foo<Y>(a);");
   verifyFormat("var x: X<Y>[];");
   verifyFormat("class C extends D<E> implements F<G>, H<I> {}");
+  verifyFormat("function f(a: List<any> = null) {\n}");
+  verifyFormat("function f(): List<any> {\n}");
 }
 
 TEST_F(FormatTestJS, OptionalTypes) {