Tests for abbreviation plugin.

Tests for RST admonition directive plugin.

Tests for the clean() security filter.

Tests for MyRenderer.block_code() -- Pygments highlighting.

Tests for interactions between multiple rendering features.

Tests that the discovery feed excludes posts with content < 150 chars.

Verify the discover feed uses the full markdown renderer (not bare mistune).

Regression tests for template variable injection via element_replacement().

Regression tests for excluding_pre() -- variables inside code blocks should NOT be replaced.

Verify the SVG favicon supports dark mode via prefers-color-scheme.

The feed strips {{ next_post }}/{{ previous_post }} instead of running 2 adjacent-post queries per entry (N+1).

Tests for fix_links() -- parentheses escaping in URLs.

Tests for footnotes plugin.

Tests for inline_html() / block_html() with escape=False.

Tests for MyRenderer.heading() -- slug IDs, duplicates, levels.

Tests for the inlined highlight CSS template include.

Tests that 8-space indentation does NOT create code blocks.

Tests for replace_inline_latex and currency vs math rendering.

Tests for MyRenderer.link() -- normal, tab:, title attribute.

Tests for ==mark== plugin.