Tracking: PrettyDiff formatter bugs (whitespace, indentation, JS-in-Twig)

This is a tracking issue for the family of formatting bugs in v1 that all stem from the underlying PrettyDiff 3 engine, which is no longer actively maintained.

These bugs share a root cause and are hard to fix at the extension level because the formatting logic lives in PrettyDiff. Grouping them here so they're easy to find.

Known formatter issues:

• #17 Auto indent not working
• #31 Twig block shorthand syntax indentation
• #39 Whitespace-control tags ({%- / -%}) not handled by formatter
• #41 Indented block comments pushed out to infinity
• #44 JavaScript in Twig mangled
• #47 Spacing in variables / tags not normalised ({{foo}} -> {{ foo }})
• #48 Block inside an HTML tag formatted incorrectly
• #49 Infinite space added before a variable inside JS
• #52 JavaScript inside <script> de-indented
• #57 href attribute sticks to the previous word inside list items
• #61 Closing brackets not auto-inserted inside inline HTML tags
• #64 Nested control structures lose indentation

Workarounds reported by users:

• Disable the formatter and format manually.
• Use prettier-plugin-twig-melody with a Twig-specific Prettier config for serious formatting needs.

If you're hitting a formatting bug, please add a comment here with a minimal before/after snippet rather than opening a new issue. Contributions toward replacing or patching the formatter are very welcome.

Thanks for your patience and for using the extension.

Start by reading the linked PrettyDiff 3 project and the referenced formatting issues. Reproduce one listed case with a minimal before/after snippet, then assess whether the contribution should patch PrettyDiff or replace the formatter; done means the selected formatter problems are addressed.