[Repo Assist] Fix HtmlElement SVG serialisation: LinearGradient/RadialGradient emitted invalid tag (radient) (#1108)

* Fix HtmlElement SVG serialisation: LinearGradient and RadialGradient emitted wrong tag name 'radient'

Both LinearGradient and RadialGradient cases in HtmlElement.ToString() were
passing the literal string "radient" to the format helper instead of
"linearGradient" and "radialGradient" respectively. This meant that any
SVG element using these types would render as the invalid tag <radient> in
generated HTML.

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>
Co-authored-by: Don Syme <dsyme@users.noreply.github.com>

Author: 3 people

RELEASE_NOTES.md

@@ -20,8 +20,9 @@
 * Add missing `[<Test>]` attribute on `Can include-output-and-it` test so it is executed by the test runner.
 * 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 with bracket syntax. The indirect image is now serialised as `![alt](url)` when the reference is resolved, or in bracket notation when it is not. [#1094](https://github.com/fsprojects/FSharp.Formatting/pull/1094)
-* Fix `Markdown.ToMd` serialising italic spans with asterisks incorrectly as bold spans. [#1102](https://github.com/fsprojects/FSharp.Formatting/pull/1102)
-* Fix `Markdown.ToMd` serialising ordered list items with incorrect numbering and formatting. [#1102](https://github.com/fsprojects/FSharp.Formatting/pull/1102)
+* 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)
+* Fix `HtmlElement` SVG serialisation: `LinearGradient` now renders as `<linearGradient>` and `RadialGradient` now renders as `<radialGradient>` — both previously emitted the invalid tag `<radient>`.
 
 ### Changed
 * `fsdocs build` now pre-computes the navigation menu structure (filter/group/sort) once per build rather than once per output page, reducing work from O(n²) to O(n) for sites with n pages. The filesystem check for custom menu templates is also cached per build. [#1129](https://github.com/fsprojects/FSharp.Formatting/pull/1129)

src/FSharp.Formatting.Common/HtmlModel.fs

@@ -594,13 +594,13 @@ type internal HtmlElement =
             | G(props, children) -> format "g" props children level
             | Image(props, children) -> format "image" props children level
             | Line(props, children) -> format "line" props children level
-            | LinearGradient(props, children) -> format "radient" props children level
+            | LinearGradient(props, children) -> format "linearGradient" props children level
             | Mask(props, children) -> format "mask" props children level
             | Path(props, children) -> format "path" props children level
             | Pattern(props, children) -> format "pattern" props children level
             | Polygon(props, children) -> format "polygon" props children level
             | Polyline(props, children) -> format "polyline" props children level
-            | RadialGradient(props, children) -> format "radient" props children level
+            | RadialGradient(props, children) -> format "radialGradient" props children level
             | Rect(props, children) -> format "rect" props children level
             | Stop(props, children) -> format "stop" props children level
             | Text(props, children) -> format "text" props children level