Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
This PR add captions to the sidebar to better distinguish different parts of the book.
Drawback: In order to maintain the current style of headings in index.html and the structure of the sections in the pdf titles are duplicated.
Why adding a few lines of css ?
The duplication add the title twice in index.html as shown below.
The css fix the issue for html, singlehtml and epub. Captions are not visible in pdf