Insert the missing slash when making a relative path absolute

[pcbeingused333]

The bug

Metadata#absolute_url and HtmlProcessor::AbsoluteUrls#process both build the URL with base_url + path:

Perron.configuration.url.delete_suffix("/") + path        # Metadata
base_url + src                                            # AbsoluteUrls

base_url has no trailing slash, so a relative path without a leading slash loses the separator:

absolute_url("cover.jpg")  # => "https://example.comcover.jpg"

image: cover.jpg in a post's frontmatter (or ![](cover.jpg) in markdown, which renders as <img src="cover.jpg">) then feeds a broken URL into og:image, twitter:image, and the feed image rewrites. A leading-slash path (/cover.jpg) already worked.

The fix

Join with a single /, tolerating a leading slash on the path:

"#{base}/#{path.delete_prefix("/")}"

Tests

metadata_test.rb — a relative frontmatter image becomes http://localhost:3000/cover.jpg. absolute_urls_test.rb — <img src="photo.jpg"> and src="nested/photo.jpg" get the slash. Both fail on main. bundle exec rake is green (403 runs, 0 failures; standardrb clean).

🤖 Generated with Claude Code

[pcbeingused333]

CI is on action_required (fork gate). Verified with bundle exec rake (Docker, Ruby 3.4): 403 runs, 0 failures, standardrb clean. Both new tests fail on main (https://example.comcover.jpg / http://localhost:3000photo.jpg — no slash).