For classes, the tree of subclasses is rendered, recursively.
For interfaces, the descendants are separated into child interfaces, which
extend the interface, and classes, which implement the interface.
Closes#19306
The API docs have changed. The line numbers are now found in
`startingLine` and `endingLine` properties rather than the `location`
property, which moved into the `fileInfo` property anyway.
* Remove whitespace before type specifiers
* Generate `new` and `call` member info for interfaces
* Ensure that there is no double space after class names
Pete Bacon Darwin
Georgios Kalpakas
Alex Rickabaugh