This content should be copied into ~/.atom/packages/language-log/grammars/log.cson folder. The content in the existing should be replaced.
If you do not like replacing the entire file, then you need to do two things.
- Get the
'log4j':
section and paste it into your log.cson. - Include following line under the top-level
'patterns'
tag.
{'include': '#log4j'}