Make duplicated content clear

Author: felicitymay

docs/codeql/codeql-language-guides/customizing-library-models-for-csharp.rst

@@ -282,7 +282,7 @@ These are the same for both of the rows above as we are adding two summaries for
 - The second value ``Enumerable`` is the class (type) name.
 - The third value ``False`` is a flag that indicates whether or not the summary also applies to all overrides of the method.
 - The fourth value ``Select<TSource,TResult>`` is the method name, along with the type parameters for the method. The names of the generic type parameters provided in the model must match the names of the generic type parameters in the method signature in the source code.
-- The fifth value ``(System.Collections.Generic.IEnumerable<TSource>,System.Func<TSource,TResult>)`` is the method input type signature. The generics in the signature must match the generics in the method signature in the source code. 
+- The fifth value ``(System.Collections.Generic.IEnumerable<TSource>,System.Func<TSource,TResult>)`` is the method input type signature. The generics in the signature must match the generics in the method signature in the source code.
 
 The sixth value should be left empty and is out of scope for this documentation.
 The remaining values are used to define the ``access path``, the ``kind``, and the ``provenance`` (origin) of the summary definition.
@@ -309,7 +309,7 @@ That is, the first row specifies that values can flow from the elements of the q
 
 Example: Add a ``neutral`` method
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-This example shows how we can model a method as being neutral with respect to flow. We will also cover how to model a property by modeling the getter of the ``Now`` property of the ``DateTime`` class as neutral. 
+This example shows how we can model a method as being neutral with respect to flow. We will also cover how to model a property by modeling the getter of the ``Now`` property of the ``DateTime`` class as neutral.
 A neutral model is used to define that there is no flow through a method.
 
 .. code-block:: csharp
@@ -346,13 +346,4 @@ The first four values identify the callable (in this case the getter of the ``No
 Threat models
 -------------
 
-.. include:: ../reusables/beta-note-threat-models.rst
-
-A threat model is a named class of dataflow sources that can be enabled or disabled independently. Threat models allow you to control the set of dataflow sources that you want to consider unsafe. For example, one codebase may only consider remote HTTP requests to be tainted, whereas another may also consider data from local files to be unsafe. You can use threat models to ensure that the relevant taint sources are used in a CodeQL analysis.
-
-The ``kind`` property of ``sourceModel`` determines which threat model a source is associated with. There are two main categories:
-
-- ``remote`` which represents requests and responses from the network. 
-- ``local`` which represents data from local files (``file``), command-line arguments (``commandargs``), database reads (``database``), and environment variables(``environment``).
- 
-When running a CodeQL analysis, the ``remote`` threat model is included by default. You can optionally include other threat models as appropriate when using the CodeQL CLI and in GitHub code scanning. For more information, see `Analyzing your code with CodeQL queries <https://docs.github.com/code-security/codeql-cli/getting-started-with-the-codeql-cli/analyzing-your-code-with-codeql-queries#including-model-packs-to-add-potential-sources-of-tainted-data>`__ and `Customizing your advanced setup for code scanning <https://docs.github.com/code-security/code-scanning/creating-an-advanced-setup-for-code-scanning/customizing-your-advanced-setup-for-code-scanning#extending-codeql-coverage-with-threat-models>`__.
+.. include:: ../reusables/threat-model-description.rst

docs/codeql/codeql-language-guides/customizing-library-models-for-java-and-kotlin.rst

@@ -297,13 +297,4 @@ The first four values identify the callable (in this case a method) to be modele
 Threat models
 -------------
 
-.. include:: ../reusables/beta-note-threat-models.rst
-
-A threat model is a named class of dataflow sources that can be enabled or disabled independently. Threat models allow you to control the set of dataflow sources that you want to consider unsafe. For example, one codebase may only consider remote HTTP requests to be tainted, whereas another may also consider data from local files to be unsafe. You can use threat models to ensure that the relevant taint sources are used in a CodeQL analysis.
-
-The ``kind`` property of the ``sourceModel`` determines which threat model a source is associated with. There are two main categories:
-
-- ``remote`` which represents requests and responses from the network. 
-- ``local`` which represents data from local files (``file``), command-line arguments (``commandargs``), database reads (``database``), and environment variables(``environment``).
- 
-When running a CodeQL analysis, the ``remote`` threat model is included by default. You can optionally include other threat models as appropriate when using the CodeQL CLI and in GitHub code scanning. For more information, see `Analyzing your code with CodeQL queries <https://docs.github.com/code-security/codeql-cli/getting-started-with-the-codeql-cli/analyzing-your-code-with-codeql-queries#including-model-packs-to-add-potential-sources-of-tainted-data>`__ and `Customizing your advanced setup for code scanning <https://docs.github.com/code-security/code-scanning/creating-an-advanced-setup-for-code-scanning/customizing-your-advanced-setup-for-code-scanning#extending-codeql-coverage-with-threat-models>`__.
+.. include:: ../reusables/threat-model-description.rst

docs/codeql/reusables/threat-model-description.rst

@@ -0,0 +1,10 @@
+.. include:: ../reusables/beta-note-threat-models.rst
+
+A threat model is a named class of dataflow sources that can be enabled or disabled independently. Threat models allow you to control the set of dataflow sources that you want to consider unsafe. For example, one codebase may only consider remote HTTP requests to be tainted, whereas another may also consider data from local files to be unsafe. You can use threat models to ensure that the relevant taint sources are used in a CodeQL analysis.
+
+The ``kind`` property of the ``sourceModel`` determines which threat model a source is associated with. There are two main categories:
+
+- ``remote`` which represents requests and responses from the network.
+- ``local`` which represents data from local files (``file``), command-line arguments (``commandargs``), database reads (``database``), and environment variables(``environment``).
+
+When running a CodeQL analysis, the ``remote`` threat model is included by default. You can optionally include other threat models as appropriate when using the CodeQL CLI and in GitHub code scanning. For more information, see `Analyzing your code with CodeQL queries <https://docs.github.com/code-security/codeql-cli/getting-started-with-the-codeql-cli/analyzing-your-code-with-codeql-queries#including-model-packs-to-add-potential-sources-of-tainted-data>`__ and `Customizing your advanced setup for code scanning <https://docs.github.com/code-security/code-scanning/creating-an-advanced-setup-for-code-scanning/customizing-your-advanced-setup-for-code-scanning#extending-codeql-coverage-with-threat-models>`__.