clang-format: [JS] Let fat arrows have 'Assignment' precedence.
This is a more correct representation than using "Equality" introduced
in r238942 which was a quick fix to solve an actual regression.
According to the typescript spec, arrows behave like "low-precedence"
assignments.
Before:
var a = a.
aaaaaaa((a: a) =>
aaaaaaaaaaaaaaaaaaaaa(
bbbbbbbbb) &&
aaaaaaaaaaaaaaaaaaaaa(
bbbbbbb));
After:
var a = a.
aaaaaaa((a: a) =>
aaaaaaaaaaaaaaaaaaaaa(
bbbbbbbbb) &&
aaaaaaaaaaaaaaaaaaaaa(
bbbbbbb));
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@239137
91177308-0d34-0410-b5e6-
96231b3b80d8