cpp file function named iterate will be rendered in wrong color.

[aeschli]

Steps to Reproduce:

1. create a file with cpp extension
2. name a function a iterate

then the letter i in the word iterate will be rendered as white color, instead of yellow.

Copied from original issue: microsoft/vscode#45008

[aeschli]

[jeff-hykin]

@aeschli If you're still look for a fix, I created a VS code extension that solves the issue (along with many other issues). https://marketplace.visualstudio.com/items?itemName=jeff-hykin.better-cpp-syntax#overview