Add note about redirection for documenting IDExxxx

docs/contributing/Documentation for IDE CodeStyle analyzers.md

@@ -7,7 +7,7 @@
 2. Each IDE diagnostic ID has a dedicated documentation page. For example:
    1. Diagnostic with code style option: <https://docs.microsoft.com/dotnet/fundamentals/code-analysis/style-rules/ide0011>
    2. Diagnostic without code style option: <https://docs.microsoft.com/dotnet/fundamentals/code-analysis/style-rules/ide0004>
-   3. Multiple diagnostic IDs sharing the same option(s): <https://docs.microsoft.com/dotnet/fundamentals/code-analysis/style-rules/ide0003-ide0009>
+   3. Multiple diagnostic IDs sharing the same option(s): <https://docs.microsoft.com/dotnet/fundamentals/code-analysis/style-rules/ide0003-ide0009>. In this case, a [redirection](https://github.com/dotnet/docs/blob/7ae7272d643aa1c6db96cad8d09d4c2332855960/.openpublishing.redirection.fundamentals.json#L11-L14) for all diagnostic IDs must be added.
 
 3. We have tabular indices for IDE diagnostic IDs and code style options for easier reference and navigation:
    1. Primary index (rule ID + code style options): <https://docs.microsoft.com/dotnet/fundamentals/code-analysis/style-rules/>
@@ -20,14 +20,14 @@
 
 Roslyn IDE team (@dotnet/roslyn-ide) is responsible for ensuring that the documentation for IDE analyzers is up-to-date. Whenever we add a new IDE analyzer, add new code style option(s) OR update semantics of existing IDE analyzers the following needs to be done:
 
-1. **Action required in [dotnet\docs](https://github.com/dotnet/docs) repo**:
+1. **Action required in [dotnet/docs](https://github.com/dotnet/docs) repo**:
    1. If you _creating a Roslyn PR for an IDE analyzer_:
-      1. Please follow the steps at [Contribute docs for 'IDExxxx' rules](https://docs.microsoft.com/contribute/dotnet/dotnet-contribute-code-analysis#contribute-docs-for-idexxxx-rules) to add documentation for IDE analyzers to [dotnet\docs](https://github.com/dotnet/docs) repo.
+      1. Please follow the steps at [Contribute docs for 'IDExxxx' rules](https://docs.microsoft.com/contribute/dotnet/dotnet-contribute-code-analysis#contribute-docs-for-idexxxx-rules) to add documentation for IDE analyzers to [dotnet/docs](https://github.com/dotnet/docs) repo.
       2. Ideally, the documentation PR should be created in parallel to the Roslyn PR or immediately following the approval/merge of Roslyn PR.
    2. If you are _reviewing a Roslyn PR for an IDE analyzer_:
       1. Please ensure that the analyzer author is made aware of the above doc contribution requirements, especially if it is a community PR.
       2. If the documentation PR in is not being created in parallel to the Roslyn PR, please ensure that a [new doc issue](https://github.com/dotnet/docs/issues) is filed in `dotnet/docs` repo to track this work.
 
 2. **No action required in Roslyn repo**: Help links have been hooked up to IDE code style analyzers in Roslyn repo in the base analyzer types, so every new IDE analyzer diagnostic ID will automatically have `https://docs.microsoft.com/dotnet/fundamentals/code-analysis/style-rules/ideXXXX` as its help link. There is no action required on the Roslyn PR to ensure this linking.
 
-If you feel any of the existing IDE rule docs have insufficient or incorrect information, please submit a PR to [dotnet\docs](https://github.com/dotnet/docs) repo to update the documentation.
+If you feel any of the existing IDE rule docs have insufficient or incorrect information, please submit a PR to [dotnet/docs](https://github.com/dotnet/docs) repo to update the documentation.