Highlighting does not work in .sh files

[serpro69]

Prerequisites

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Description

Steps to Reproduce

Expected behavior:
#TODO should be highlighted in shell script files

Actual behavior:
#TODO is not highlighted in shell script files

Reproduces how often:
100%

Versions

Atom : 1.45.0
Electron: 4.2.7
Chrome : 69.0.3497.128
Node : 10.11.0

OS: Ubuntu 20.04