Better visual distinction between --pretty --watch recompile results?

[JoshuaKGoldberg]

TypeScript Version: 2.7.0-dev.20171126

While running tsc --pretty --watch, there's not much visual distinction between different rounds of failures. Other than a few blank lines on the right half of the screen, they look very similar. When I have a lot of files I'm going through refactor errors through it can be hard to tell what's fixed or fresh.

For comparison, this is what TSLint's stylish formatter outputs...

...and this is what gulp outputs:

---

A few suggestions to make this display easier to read (replace "grey" with any non-white color):

• Use grey text for line/column numbers and/or grey+bold text for TS2451-style identifiers
• Use grey text for times
• Use grey and/or italic text for File change detected. lines
• In the Compilation complete. lines:
  • Say whether compilation failed or succeeded
  • Use green or red text appropriately
• Add a CLI option to clear the console when a new run starts

[mhegazy]

Would #17756 address the issue?

[JoshuaKGoldberg]

Console clearing would make things much better!...

...but it would still be nice to have the more readable colors. This issue would just be much less important.

[mhegazy]

#17756 is waiting on one small change, if you want to pick it up and get it in would be happy to merge it.

[mhegazy]

Also PRs for additional colors for errors message with --pretty are welcomed.

[JoshuaKGoldberg]

I'll try to add the colors in ASAP! :)