Add shebang to scripts/generate_docs
Remove window-open-behaviour setting.
Support multiline setting descriptions.
Improve settings value documentation.
generate_doc: Use OrderedDict for argument docs.
generate_doc: Strip leading * for vararg docs.
generate_doc: Add varargs to syntax.
generate_doc: Support multi-line argument description.
Remove editable hinting.

The code for it was removed some time ago, and fixing it would mean some
unneeded code duplication. Let's remove it and see if anyone complains.
Document the :hint command.
Avoid None values in documentation.
Fix typo
Improve command documentation.
Fix too long lines.
Merge tab-focus-last into tab-focus.
Whitespace fixes
Simplify :hint by adding a 'fill' target.