IDs in headings behave differently compared to other markdown renderers about markdown HOT 2 CLOSED

Python Markdown has been like this for a long, long time.

This was my thought as well. In fact, it is very likely that we implemented our behavior first and other implementations added their behavior later. They failed to follow our lead. In fact, I would argue that our behavior (collapsing multiple consecutive hyphens into 1) is the correct behavior and implementations which do not do that should be changed.

Regardless, we now have many thousands of existing documents which have many thousands of links pointing to them using thee existing format. A change in behavior would break many of the existing links. Therefore, we will not be making a change to the default behavior.

from markdown.

Python Markdown has been like this for a long, long time. Making a change to not collapse - into a single instance of - would not be backward compatible and would likely break many user's expectations.

With that said Python Markdown provides a way where you can override the slug behavior if you so choose. You can simply craft your own slugify method and use the slugify option to specify it.

from markdown.