PEP 515: Underscores in numeric literals #221

Prerequisites

• Put an X between the brackets on this line if you have done all of the following:
  • Reproduced the problem in Safe Mode: http://flight-manual.atom.io/hacking-atom/sections/debugging/#using-safe-mode
  • Followed all applicable steps in the debugging guide: http://flight-manual.atom.io/hacking-atom/sections/debugging/
  • Checked the FAQs on the message board for common solutions: https://discuss.atom.io/c/faq
  • Checked that your issue isn't already filed: https://github.com/issues?utf8=✓&q=is%3Aissue+user%3Aatom
  • Checked that there is not already an Atom package that provides the described functionality: https://atom.io/packages

Description

Numbers like 100_000_000 aren't properly highlighted (see PEP 515 specification). This should be pretty easy to fix, just edit these lines in the grammar. I tried to fix this myself, but wasn't able to get atom dev running.

Steps to Reproduce

1. Put 10_000_000 in source code.

Expected behavior:
Proper highlighting

Actual behavior:
Number highlighting stops in the middle of the number

Reproduces how often:
100%

Versions

Atom    : 1.23.3
Electron: 1.6.15
Chrome  : 56.0.2924.87
Node    : 7.4.0