[Repo Assist] Fix Markdown.ToMd: Emphasis serialised as bold; ordered list 0-indexed (#1102)

* Fix Markdown.ToMd: Emphasis serialised as bold, ordered list 0-indexed

Two bugs in MarkdownUtils.fs formatSpan/formatParagraph:

1. Emphasis (italic) was serialised as **...** (bold) instead of *...*,
   causing round-trip loss: *italic* → **italic**

2. Ordered list items used 0-based indexing with no period:
   "0 first", "1 second" instead of "1. first", "2. second"

Fix both and add four regression tests.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* ci: trigger checks

* docs: add issue/PR links to all Unreleased release note entries

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* ci: trigger checks

---------

Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: github-actions[bot]

RELEASE_NOTES.md

@@ -4,7 +4,9 @@
 
 ### Fixed
 * Add regression test confirming that types whose name matches their enclosing namespace are correctly included in generated API docs. [#944](https://github.com/fsprojects/FSharp.Formatting/issues/944)
-* Fix crash (`failwith "tbd - IndirectImage"`) when `Markdown.ToMd` is called on a document containing reference-style images (`![alt][ref]`). The indirect image is now serialised as `![alt](url)` when the reference is resolved, or `![alt][ref]` when it is not.
+* Fix crash (`failwith "tbd - IndirectImage"`) when `Markdown.ToMd` is called on a document containing reference-style images (`![alt][ref]`). The indirect image is now serialised as `![alt](url)` when the reference is resolved, or `![alt][ref]` when it is not. [#1094](https://github.com/fsprojects/FSharp.Formatting/pull/1094)
+* Fix `Markdown.ToMd` serialising `*emphasis*` (italic) spans as `**...**` (bold) instead of `*...*`. [#1102](https://github.com/fsprojects/FSharp.Formatting/pull/1102)
+* Fix `Markdown.ToMd` serialising ordered list items with 0-based numbering and no period (e.g. `0 first`) instead of 1-based with a period (e.g. `1. first`). [#1102](https://github.com/fsprojects/FSharp.Formatting/pull/1102)
 
 ## 22.0.0-alpha.2 - 2026-03-13
 

src/FSharp.Formatting.Markdown/MarkdownUtils.fs

@@ -115,7 +115,7 @@ module internal MarkdownUtils =
         | DirectImage(body, link, _, _) -> sprintf "![%s](%s)" body link
         | Strong(body, _) -> "**" + formatSpans ctx body + "**"
         | InlineCode(body, _) -> "`" + body + "`"
-        | Emphasis(body, _) -> "**" + formatSpans ctx body + "**"
+        | Emphasis(body, _) -> "*" + formatSpans ctx body + "*"
 
     /// Format a list of MarkdownSpan
     and formatSpans ctx spans =
@@ -177,7 +177,7 @@ module internal MarkdownUtils =
 
                       for (j, line) in List.indexed lines do
                           if i = 0 && j = 0 then
-                              yield $"%i{n} " + line
+                              yield $"%i{n + 1}. " + line
                           else
                               yield "  " + line
 

tests/FSharp.Markdown.Tests/Markdown.fs

@@ -1257,6 +1257,33 @@ let ``ToMd preserves an unordered list`` () =
     result |> should contain "banana"
     result |> should contain "cherry"
 
+[<Test>]
+let ``ToMd preserves emphasis (italic) text`` () =
+    // Emphasis must serialise as *...* not **...** (bold)
+    "*italic*" |> toMd |> should contain "*italic*"
+
+[<Test>]
+let ``ToMd preserves emphasis distinct from strong`` () =
+    let result = "**bold** and *italic*" |> toMd
+    result |> should contain "**bold**"
+    // Emphasis must not be rendered with double asterisks
+    result |> should not' (contain "**italic**")
+    result |> should contain "*italic*"
+
+[<Test>]
+let ``ToMd preserves an ordered list with correct numbering`` () =
+    let result = "1. first\n2. second\n3. third" |> toMd
+    result |> should contain "1. first"
+    result |> should contain "2. second"
+    result |> should contain "3. third"
+
+[<Test>]
+let ``ToMd ordered list does not use zero-based numbering`` () =
+    // Before fix: ordered list items were prefixed "0 ", "1 ", "2 " (0-indexed, no period)
+    let result = "1. only item" |> toMd
+    result |> should not' (contain "0 only item")
+    result |> should contain "1. only item"
+
 [<Test>]
 let ``ToMd preserves a fenced code block`` () =
     let md = "```fsharp\nlet x = 1\n```"