Hygiene: Rename escape => regexEscape in most-read-filter.js

Authored by Mholloway on Mar 13 2018, 3:57 PM.

Description

Hygiene: Rename escape => regexEscape in most-read-filter.js

This will help prevent its being confused with the native global escape()
function.

Change-Id: I39a0b8cfb43d619d183403b0b889fd0dbb9a3c6a