- VSCode Version: 1.29.1 - OS Version: OSX Steps to Reproduce: ```ts export function isInOpenInterval(start: number, end: number) { return tersible(a => a > start && a < end, () => `(${start}...${end})`) } export function isInClosedInterval(start: number, end: number) { return tersible(a => a >= start && a <= end, () => `[${start}...${end}]`) } ```  Causes by `a < end`. If I enclose it with `(a < end)` then it is highlighting correctly.