Grammatically Correct: The writer's essential guide to punctuation ...

GRAMMATICALLY CORRECT
Also, do not confuse gracefully recasting a sentence with simply
repeating the noun:
The writer of technical manuals is cautioned against inserting humorous
comments. The writer may feel that such comments liven up a dull topic
and make it more readable, but the writer should bear in mind that
humor is not universal, and what the writer finds funny, another person
may find annoying or offensive.
Readers of such prose would probably wish its writer had gone
with "he" instead.
In sum, there is no single strategy that will work for all situations,
and it is usually best not to use a single strategy throughout. With
some effort and imagination, however, you can write around the
gender problem in a way that should leave none of your readers
alienated.
302