Editors/layout people make the titles and headlines that get printed, not the author.
And they also correct mistakes like that.
I have edited several technical books for Macmillan Publishing; and yes, part of my job was punctuation corrections.
https://www.thebalancecareers.com/writer-and-editor-526082
"An editor's job can include:
- Reviewing, rewriting, and editing the work of writers"
Also:
What does an Editor Do | The Editor's Blog
"Copy editor—Responsible for checking article facts and ensuring that an article matches in-house style guides. Also checks spelling, grammar, and punctuation. May also suggest word changes to keep the newspaper or magazine from being sued. May arrange layout of articles and sidebars. Copy editors might write headlines."
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