From dee84113abba402a87b9e0440bfaa10fd67fe909 Mon Sep 17 00:00:00 2001
From: Peter Elliott <pelliott@ualberta.ca>
Date: Sun, 29 Aug 2021 15:59:41 -0700
Subject: [PATCH] LibMarkdown: Match HTML formatting of Commonmark tests

This patch changes the HTML formatting (where to put newlines, etc...)
to better match commonmark's test cases. This has minimal effect of the
correctness of our markdown implementation, but makes it easier to test.

Changes:
 - Use <em> instead of <i>.
 - Newline before end of code block.
 - <hr /> instead of <hr>.
 - Newline before first list item.
 - Newline between lines of a paragraph.
 - Trim whitespace on lines of paragraphs.

 Tests passed: 33/652 -> 87/652
---
 Userland/Libraries/LibMarkdown/CodeBlock.cpp      | 6 +++---
 Userland/Libraries/LibMarkdown/HorizontalRule.cpp | 2 +-
 Userland/Libraries/LibMarkdown/List.cpp           | 2 +-
 Userland/Libraries/LibMarkdown/Paragraph.cpp      | 4 ++--
 Userland/Libraries/LibMarkdown/Text.cpp           | 2 +-
 5 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/Userland/Libraries/LibMarkdown/CodeBlock.cpp b/Userland/Libraries/LibMarkdown/CodeBlock.cpp
index 58b5895f91f..3f8d80a7f46 100644
--- a/Userland/Libraries/LibMarkdown/CodeBlock.cpp
+++ b/Userland/Libraries/LibMarkdown/CodeBlock.cpp
@@ -36,7 +36,7 @@ String CodeBlock::render_to_html() const
     if (style.strong)
         builder.append("<b>");
     if (style.emph)
-        builder.append("<i>");
+        builder.append("<em>");
 
     if (style_language.is_empty())
         builder.append("<code>");
@@ -48,10 +48,10 @@ String CodeBlock::render_to_html() const
     else
         builder.append(escape_html_entities(m_code));
 
-    builder.append("</code>");
+    builder.append("\n</code>");
 
     if (style.emph)
-        builder.append("</i>");
+        builder.append("</em>");
     if (style.strong)
         builder.append("</b>");
 
diff --git a/Userland/Libraries/LibMarkdown/HorizontalRule.cpp b/Userland/Libraries/LibMarkdown/HorizontalRule.cpp
index 1fb7cc710bd..190380c175e 100644
--- a/Userland/Libraries/LibMarkdown/HorizontalRule.cpp
+++ b/Userland/Libraries/LibMarkdown/HorizontalRule.cpp
@@ -12,7 +12,7 @@ namespace Markdown {
 
 String HorizontalRule::render_to_html() const
 {
-    return "<hr>\n";
+    return "<hr />\n";
 }
 
 String HorizontalRule::render_for_terminal(size_t view_width) const
diff --git a/Userland/Libraries/LibMarkdown/List.cpp b/Userland/Libraries/LibMarkdown/List.cpp
index b23baed1870..8162090f008 100644
--- a/Userland/Libraries/LibMarkdown/List.cpp
+++ b/Userland/Libraries/LibMarkdown/List.cpp
@@ -14,7 +14,7 @@ String List::render_to_html() const
     StringBuilder builder;
 
     const char* tag = m_is_ordered ? "ol" : "ul";
-    builder.appendff("<{}>", tag);
+    builder.appendff("<{}>\n", tag);
 
     for (auto& item : m_items) {
         builder.append("<li>");
diff --git a/Userland/Libraries/LibMarkdown/Paragraph.cpp b/Userland/Libraries/LibMarkdown/Paragraph.cpp
index d252fae4642..c90e016b114 100644
--- a/Userland/Libraries/LibMarkdown/Paragraph.cpp
+++ b/Userland/Libraries/LibMarkdown/Paragraph.cpp
@@ -16,9 +16,9 @@ String Paragraph::render_to_html() const
     bool first = true;
     for (auto& line : m_lines) {
         if (!first)
-            builder.append(' ');
+            builder.append('\n');
         first = false;
-        builder.append(line.text().render_to_html());
+        builder.append(line.text().render_to_html().trim(" \t"));
     }
     builder.append("</p>\n");
     return builder.build();
diff --git a/Userland/Libraries/LibMarkdown/Text.cpp b/Userland/Libraries/LibMarkdown/Text.cpp
index b3990215891..ab617921426 100644
--- a/Userland/Libraries/LibMarkdown/Text.cpp
+++ b/Userland/Libraries/LibMarkdown/Text.cpp
@@ -44,7 +44,7 @@ String Text::render_to_html() const
             bool Style::*flag;
         };
         TagAndFlag tags_and_flags[] = {
-            { "i", &Style::emph },
+            { "em", &Style::emph },
             { "b", &Style::strong },
             { "code", &Style::code }
         };