• H037 no longer reads a quoted string inside a template tag as an attribute name, so href="{{ url "/a/b" "/a/c" }}" is not reported as a duplicate a. This started in 1.45.0.
• A jinja call written over several lines keeps its closing bracket at the indent of the tag holding it, rather than pulling ) }} to the start of the line.
• Arguments nested inside a jinja call written over several lines keep their depth, so the inner argument of {{ function([nested(...)]) }} is no longer dedented by one level.
• An element after a line that closes both a template block and an html tag, as in {%- endif %}:</b>, keeps its own level instead of being indented one further.
• A template tag written over several lines inside an attribute keeps the indentation the author gave it, so the body of data-x='{{ f({ ... }) }}' no longer loses a space from every line.
• --single-attribute-per-line reaches attributes guarded by a template tag, so {% if x %} a="1" b="2" {% endif %} inside a tag no longer keeps them on one line past --max-line-length.
• A tag whose attributes push its line past --max-line-length is spread over several lines, where before only --max-attribute-length decided. A line long because of its text is left alone, since breaking text would change what renders.
• A tag whose name a template writes, as in <{{ tag }}>, is read as a tag. It was not recognised at all, so a template block among its attributes was pulled out of the tag and re-indented to the start of the line, and its attributes went unformatted and unchecked.