Colocate definitions of golden test paths.

Rename golden files for easier tracking.

Prepare for test modules sharing PrettyShow.

Prepare for test modules sharing font options.

Make demo font size better match window.

Separate internal plain Paragraph/ParagraphLayout.

Implement BiDi resolved level reordering.

Fix style: long lines.

Fix style: small Prelude imports.

Fix style: external vs internal imports.

Fix style: unnecessary do notation.

Fix style: white space in lambdas.

Fix style: white space around operators.

Fix style: white space in multi-line lists.

Fix style: white space in exports and imports.

Fix style: bullet points in comments.

Fix style: remove duplicate spaces.

Mark some lists as explicitly non-empty.

Fix typos in comments.

Fix data types in harfbuzz-pure.