add note about option format (#44098)

Author: gewarren

docs/fundamentals/code-analysis/style-rules/ide0079.md

@@ -1,7 +1,7 @@
 ---
 title: "IDE0079: Remove unnecessary suppression"
 description: "Learn about code analysis rule IDE0079: Remove unnecessary suppression"
-ms.date: 03/23/2023
+ms.date: 12/27/2024
 f1_keywords:
 - IDE0079
 - dotnet_remove_unnecessary_suppression_exclusions
@@ -71,15 +71,23 @@ class C2
 
 Options specify the behavior that you want the rule to enforce. For information about configuring options, see [Option format](language-rules.md#option-format).
 
+> [!NOTE]
+> Setting a severity in the format `option_name = value:severity` doesn't apply to the `dotnet_remove_unnecessary_suppression_exclusions` option and should be avoided. Instead, specify the severity using a separate entry, for example:
+>
+> ```ini
+> dotnet_remove_unnecessary_suppression_exclusions = none
+> dotnet_diagnostic.IDE0079.severity = warning
+> ```
+
 ### dotnet_remove_unnecessary_suppression_exclusions
 
-| Property                 | Value                                                                    | Description                                    |
-| ------------------------ | ------------------------------------------------------------------------ | ---------------------------------------------- |
-| **Option name**          | dotnet_remove_unnecessary_suppression_exclusions                         |                                                |
-| **Option values**        | `,` separated list of rule IDs or categories (prefixed with `category:`) | Excludes suppressions for the listed rules     |
-|                          | `all`                                                                    | Disables the rule (all rule IDs excluded)      |
-|                          | `none`                                                                   | Enables the rule for all rules (no exclusions) |
-| **Default option value** | `none`                                                                   |                                                |
+| Property                 | Value                                            | Description                                    |
+|--------------------------|--------------------------------------------------|------------------------------------------------|
+| **Option name**          | dotnet_remove_unnecessary_suppression_exclusions |                                                |
+| **Option values**        | Comma-separated list of rule IDs or categories (prefixed with `category:`) | Excludes suppressions for the listed rules or categories |
+|                          | `all`                                            | Disables the rule (all rule IDs excluded)      |
+|                          | `none`                                           | Enables the rule for all rules (no exclusions) |
+| **Default option value** | `none`                                           |                                                |
 
 ```csharp
 using System.Diagnostics.CodeAnalysis;