Fix missing backtick and incorrect variable in DiagnosticLinkInlineParser

[Copilot]

• Fix missing closing backtick in error message on line 275
• Fix incorrect variable usage (url -> newUrl) in LastIndexOf on line 343
• Run unit tests to ensure changes don't break existing functionality
• Verify build succeeds after changes
• Verify code formatting
• Fix indentation to use tabs instead of spaces (lines 280-282)

Original prompt

Please apply the following diffs and create a pull request.
Once the PR is ready, give it a title based on the messages of the fixes being applied.

[{"message":"Missing closing backtick in the error message. The string should end with `{pathOnDisk}`.","fixFiles":[{"filePath":"src/Elastic.Markdown/Myst/InlineParsers/DiagnosticLinkInlineParser.cs","diff":"diff --git a/src/Elastic.Markdown/Myst/InlineParsers/DiagnosticLinkInlineParser.cs b/src/Elastic.Markdown/Myst/InlineParsers/DiagnosticLinkInlineParser.cs\n--- a/src/Elastic.Markdown/Myst/InlineParsers/DiagnosticLinkInlineParser.cs\n+++ b/src/Elastic.Markdown/Myst/InlineParsers/DiagnosticLinkInlineParser.cs\n@@ -272,7 +272,7 @@\n \t\t\t\tprocessor.EmitWarning(link, $\"Local file `{url}` has a redirect, please update this reference to: {name}\");\n \t\t\t}\n \t\t\telse\n-\t\t\t\tprocessor.EmitError(link, $\"`{url}` does not exist. If it was recently removed add a redirect. resolved to `{pathOnDisk}\");\n+\t\t\t\tprocessor.EmitError(link, $\"`{url}` does not exist. If it was recently removed add a redirect. resolved to `{pathOnDisk}`\");\n \n \t\t}\n \t}\n"}]},{"message":"Using `url` instead of `newUrl` for LastIndexOf is incorrect. This should be `newUrl.LastIndexOf(\".md\", StringComparison.Ordinal)` to maintain consistency with the variable being modified.","fixFiles":[{"filePath":"src/Elastic.Markdown/Myst/InlineParsers/DiagnosticLinkInlineParser.cs","diff":"diff --git a/src/Elastic.Markdown/Myst/InlineParsers/DiagnosticLinkInlineParser.cs b/src/Elastic.Markdown/Myst/InlineParsers/DiagnosticLinkInlineParser.cs\n--- a/src/Elastic.Markdown/Myst/InlineParsers/DiagnosticLinkInlineParser.cs\n+++ b/src/Elastic.Markdown/Myst/InlineParsers/DiagnosticLinkInlineParser.cs\n@@ -340,7 +340,7 @@\n \t\t{\n \t\t\tnewUrl = newUrl.EndsWith($\"{Path.DirectorySeparatorChar}index.md\")\n \t\t\t\t? newUrl.Remove(newUrl.LastIndexOf(\"index.md\", StringComparison.Ordinal), \"index.md\".Length)\n-\t\t\t\t: newUrl.Remove(url.LastIndexOf(\".md\", StringComparison.Ordinal), \".md\".Length);\n+\t\t\t\t: newUrl.Remove(newUrl.LastIndexOf(\".md\", StringComparison.Ordinal), \".md\".Length);\n \t\t}\n \n \t\t// TODO this is hardcoded should be part of extension system\n"}]}]

---

💬 We'd love your input! Share your thoughts on Copilot coding agent in our 2 minute survey.

[reakaleek]

@copilot fix the formatting

[Copilot]

Fixed in 763675b - replaced spaces with tabs for consistent indentation.