The bug

Both Fabulous! and Fancy graphics tool tips have missing commas in certain parts.

The Fabulous! graphics tool tip should have the following text:

Fabulous! graphics uses screen shaders for drawing weather, clouds, and particles behind translucent blocks and water.

The Fancy graphics tool tip should also have the following text:

Weather, clouds, and particles may not appear behind translucent blocks or water.

The reason for the bug is that commas should precede the last word of a list having three or more words:

red, yellow, and blue

Workaround

A resource pack is provided below to fix the bug for the "English (US)" language. It also adds another new line to all graphics tool tips to make them look cleaner.