[Repo Assist] Split MarkdownParser.fs into inline and block-level parsers

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🤖 This PR was created by Repo Assist, an automated AI assistant.

Closes #1022 (partial — continuing file-splitting work)

Summary

Split the 1500-line MarkdownParser.fs into two focused, cohesive files:

File	Lines	Contents
MarkdownInlineParser.fs	~560	InlineParser module — inline formatting: active patterns for emphasis/links/entities, ParsingContext type, parseChars, parseSpans
MarkdownParser.fs	~960	Parser module — block-level parsing: headings, lists, tables, blockquotes, code blocks, parseParagraphs

Root Cause / Rationale

MarkdownParser.fs mixed two distinct parsing concerns: inline span parsing (characters, emphasis, links) and block-level paragraph parsing. The natural break is at the section comment "Parsing of Markdown - second part handles paragraph-level formatting".

Changes

• New: src/FSharp.Formatting.Markdown/MarkdownInlineParser.fs — module internal FSharp.Formatting.Markdown.InlineParser
• Modified: src/FSharp.Formatting.Markdown/MarkdownParser.fs — now module internal FSharp.Formatting.Markdown.Parser, opens InlineParser
• Modified: src/FSharp.Formatting.Markdown/Markdown.fs — also opens InlineParser to access ParsingContext
• Modified: FSharp.Formatting.Markdown.fsproj — MarkdownInlineParser.fs added before MarkdownParser.fs
• Modified: RELEASE_NOTES.md

Note

This avoids all files currently modified in open PRs (#1019: BuildCommand.fs, Literate.fs, Program.fs; #1045: SymbolReader.fs, ApiDocTypes.fs, GenerateHtml.fs etc.), per maintainer guidance.

Test Status

✅ All 257 markdown tests pass (dotnet test FSharp.Markdown.Tests).
✅ Fantomas formatting: no changes needed.
✅ Build: dotnet build succeeded with 0 warnings, 0 errors.

Generated by Repo Assist for issue #1022

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[dsyme]

/repo-assist you should actually be deleting MarkdownParser.fs shouldn't you?

[github-actions]

Commit pushed: 25292ea

Generated by Repo Assist

[github-actions]

🤖 This is an automated response from Repo Assist.

Good catch, @dsyme! You're right — the split should result in two new files replacing the original, not a modification of the old one.

I've pushed a follow-up commit that:

• Renames MarkdownParser.fs → MarkdownBlockParser.fs (git mv, preserving history)
• Updates the module name: FSharp.Formatting.Markdown.Parser → FSharp.Formatting.Markdown.BlockParser
• Updates the open statement in Markdown.fs accordingly
• Updates the .fsproj to reference MarkdownBlockParser.fs

The build still succeeds with 0 warnings/errors.

Generated by Repo Assist for issue #1052

To install this agentic workflow, run

gh aw add githubnext/agentics/workflows/repo-assist.md@afb00b92a9514fee9a14c583f059a03d05738f70