Previously, using ToMarkdown on a label-list would generate output that could not be reparsed by the RDoc::Markdown parser: ``` md = <<~MD apple : a red fruit banana : a yellow fruit MD doc = RDoc::Markdown.parse(md) doc # => [doc: [list: NOTE [item: ["apple"]; [para: "a red fruit"]], [item: ["banana"]; [para: "a yellow fruit"]]]] new_md = doc.accept(RDoc::Markup::ToMarkdown.new) new_md # => "apple\n: a red fruit\nbanana\n: a yellow fruit\n\n" new_doc = RDoc::Markdown.parse(new_md) new_doc # => [doc: [list: NOTE [item: ["apple"]; [para: "a red fruit\nbanana\n: a yellow fruit"]]]] ``` The issue is that the [PHP Markdown Extra spec][1] requires a newline after each definition list item, but ToMarkdown was not putting newlines between label-list items. This commit fixes the issue by properly appending a newline after each label-list item so that the output of ToMarkdown can be reparsed by RDoc::Markdown: ``` md = <<~MD apple : a red fruit banana : a yellow fruit MD doc = RDoc::Markdown.parse(mdoc) doc # => [doc: [list: NOTE [item: ["apple"]; [para: "a red fruit"]], [item: ["banana"]; [para: "a yellow fruit"]]]] new_md = doc.accept(RDoc::Markup::ToMarkdown.new) new_md # => "apple\n: a red fruit\n\nbanana\n: a yellow fruit\n\n" new_doc = RDoc::Markdown.parse(new_md) new_doc # => [doc: [list: NOTE [item: ["apple"]; [para: "a red fruit"]], [item: ["banana"]; [para: "a yellow fruit"]]]] ``` [1]: https://michelf.ca/projects/php-markdown/extra/#def-list https://github.com/ruby/rdoc/commit/c65266437c