[Repo Assist] Fix Markdown.ToMd: Emphasis serialised as bold; ordered list 0-indexed

[github-actions]

🤖 This is an automated PR from Repo Assist.

Two bugs found and fixed in Markdown.ToMd (the MarkdownUtils.fs serialiser):

Bugs fixed

1. Emphasis serialised as bold (**...**) instead of italic (*...*)

formatSpan had a copy-paste error:

// Before (wrong — same as Strong)
| Emphasis(body, _) -> "**" + formatSpans ctx body + "**"

// After (correct)
| Emphasis(body, _) -> "*" + formatSpans ctx body + "*"

Round-trip before fix: *italic* → **italic** (text becomes bold)

2. Ordered list items use 0-based numbering with no period

formatParagraph used List.indexed (0-based) and formatted as $"%i{n} ":

// Before (wrong — "0 first", "1 second", ...)
yield $"%i{n} " + line

// After (correct — "1. first", "2. second", ...)
yield $"%i{n + 1}. " + line

Round-trip before fix: 1. first\n2. second → 0 first\n1 second

Tests added

Four new regression tests in tests/FSharp.Markdown.Tests/Markdown.fs:

• ToMd preserves emphasis (italic) text
• ToMd preserves emphasis distinct from strong
• ToMd preserves an ordered list with correct numbering
• ToMd ordered list does not use zero-based numbering

Test Status

• ✅ dotnet build FSharp.Formatting.sln --configuration Release — succeeded (1 pre-existing FS0760 warning)
• ✅ dotnet test FSharp.Formatting.sln --configuration Release --no-build — all 527 tests pass (281 Markdown, 30 CodeFormat, 8 fsdocs-tool, 120 Literate, 88 ApiDocs)
• ✅ dotnet fantomas src/FSharp.Formatting.Markdown/MarkdownUtils.fs tests/FSharp.Markdown.Tests/Markdown.fs --check — no formatting changes needed

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[dsyme]

@nojaf Nice fix by the bot!

[nojaf]

/repo-assist release notes should always have a link to either a github issue or PR. Right now end-users can't piece your fix together with anything.

[github-actions]

Commit pushed: 8dd8f8a

Generated by Repo Assist

[github-actions]

🤖 This is an automated response from Repo Assist.

Good catch, @nojaf! I've pushed a fix to this PR — all three entries in the [Unreleased] section that were missing links now have them:

• IndirectImage crash fix → #1094
• Emphasis serialisation fix → #1102
• Ordered list numbering fix → #1102

I'll make sure every future release note entry includes a link from the start.

Generated by Repo Assist for issue #1102 · ◷

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