Prepare for test modules sharing font options.

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.

Mark some lists as explicitly non-empty.

Fix typos in comments.

Fix data types in harfbuzz-pure.

Implement generic pagination internally.

Test removing spaces around lines.

Remove collapsible spaces at beginning of lines.

Allow empty lines when hard line breaking.

Support hard line breaks.

Add shaped runs for demo.