Markers for the line number portion

Hi,

Most of the IDEs provide a difference between the area used by the line numbers and the code either through a different colour, a texture, or a border colour, for example, in Webstorm:

image

VS Code:

image

This is just an aesthetic issue and does not cause any problem, it just creates a little trouble in identifying the area where the code starts and due to this there can be minor issues while reading an unaligned code, for example,

image

Here await collectCoverage(); should have been placed a little righter than (async() => { . It becomes noticeable but to identify where the alignment actually broke becomes a little subtle because everything is white in color and ( character spares some space on its left side.

It will be nice if we can have something like:

image

Here’s the link, Markers for the line number portion while reading a file in Github · Issue #1954 · isaacs/github · GitHub, to the issue that I created in GitHub - isaacs/github: Just a place to track issues and feature requests that I have for github repo