Fix excessive spacing before lists

[Copilot]

Description

Lists were rendering with 2 blank lines before them instead of 1. Root cause: MediaWikiListItem prepends a newline, which combined with paragraph trailing breaks (2) produced 3 total newlines.

Solution: Convert the first MediaWikiListItem to MediaWikiText for top-level lists, stripping the automatic leading newline while preserving list formatting.

// For top-level lists, convert first item to avoid automatic leading newline
if (!options?.level && content.length > 0 && content[0] instanceof MediaWikiListItem) {
  const firstItem = content[0];
  const firstItemText = firstItem.build();
  const textContent = firstItemText.startsWith("\n") ? firstItemText.slice(1) : firstItemText;
  content[0] = new MediaWikiText(textContent);
}

Before:

meaning:


* Players could buy them...

After:

meaning:

* Players could buy them...

Original prompt

---

This section details on the original issue you should resolve

<issue_title>Unnecessary new line before ordered/unordered list</issue_title>
<issue_description>News link: https://secure.runescape.com/m=news/getting-around?oldschool=1

Unordered/Ordered lists have a new line before the list:

Actual:

If this proposal passes, both the Red and Blue Rum would become tradeable, meaning:


* Players could buy them from other players or via the Grand Exchange.
* Players who regularly play Trouble Brewing could sell spare rum from the rewards shop.

Expected:

If this proposal passes, both the Red and Blue Rum would become tradeable, meaning:

* Players could buy them from other players or via the Grand Exchange.
* Players who regularly play Trouble Brewing could sell spare rum from the rewards shop.
```</issue_description>

<agent_instructions>The parser is `listParser`</agent_instructions>

## Comments on the Issue (you are @copilot in this section)

<comments>
</comments>

• Fixes Unnecessary new line before ordered/unordered list #252

---

💡 You can make Copilot smarter by setting up custom instructions, customizing its development environment and configuring Model Context Protocol (MCP) servers. Learn more Copilot coding agent tips in the docs.