clang-format: [JS] Fix incorrect line length calculation.

llvm-svn: 238841
diff --git a/clang/unittests/Format/FormatTestJS.cpp b/clang/unittests/Format/FormatTestJS.cpp
index 25113ab..a18d35b 100644
--- a/clang/unittests/Format/FormatTestJS.cpp
+++ b/clang/unittests/Format/FormatTestJS.cpp
@@ -259,7 +259,8 @@
                "]);");
   verifyFormat("var someVariable = SomeFuntion([\n"
                "  [aaaaaaaaaaaaaaaaaaaaaa, bbbbbbbbbbbbbbbbbbbbbb],\n"
-               "]);");
+               "]);",
+               getGoogleJSStyleWithColumns(51));
   verifyFormat("var someVariable = SomeFuntion(aaaa, [\n"
                "  aaaaaaaaaaaaaaaaaaaaaaaaaaa,\n"
                "  bbbbbbbbbbbbbbbbbbbbbbbbbbb,\n"