clang-format: [JS] fix whitespace around "of" operator.

Summary:
Previously:
    import {of } from 'x';
    of (null);

Now:
    import {of} from 'x';
    of(null);

Reviewers: djasper

Subscribers: cfe-commits, klimek

Differential Revision: https://reviews.llvm.org/D31698

llvm-svn: 299533
diff --git a/clang/unittests/Format/FormatTestJS.cpp b/clang/unittests/Format/FormatTestJS.cpp
index f24ddc8..d8fa8e4 100644
--- a/clang/unittests/Format/FormatTestJS.cpp
+++ b/clang/unittests/Format/FormatTestJS.cpp
@@ -132,6 +132,8 @@
   verifyFormat("x.interface = 1;");
   verifyFormat("x.for = 1;");
   verifyFormat("x.of() = 1;");
+  verifyFormat("of(null);");
+  verifyFormat("import {of} from 'x';");
   verifyFormat("x.in() = 1;");
   verifyFormat("x.let() = 1;");
   verifyFormat("x.var() = 1;");