Convert footnotes in tests/README.md to GitHub style

Footnotes were converted to the [^X] style with associated single
paragraph footnotes.

Author: delphidabbler

Diff for: tests/README.md

@@ -11,60 +11,42 @@ The project has the following directories:
 Contains:
 
 * this file: `README.md`
-* project group files for Delphi 2006..XE[[1]](#1) that group together all the sub-projects that are stored in sub-directories of `Src`.
+* project group files for Delphi 2006..XE[^1] that group together all the sub-projects that are stored in sub-directories of `Src`.
 
 ### `./Cat-Arrays`
 
-Contains the _TestArraysCat_[[2]](#2) project that provides _DUnit_ tests for snippets from the database's _Arrays_ category. Currently tests are only available for the _TArrayUtils_ advanced record.
+Contains the _TestArraysCat_[^2] project that provides _DUnit_ tests for snippets from the database's _Arrays_ category. Currently tests are only available for the _TArrayUtils_ advanced record.
 
 ### `./Cat-Date`
 
-Contains the _TestDateCat_[[2]](#2) project that provides _DUnit_ tests for selected snippets from the database's _Date and Time_ category.
+Contains the _TestDateCat_[^2] project that provides _DUnit_ tests for selected snippets from the database's _Date and Time_ category.
 
 ### `./Cat-Drive`
 
-Contains the _TestDriveCat_[[2]](#2) project that implements a GUI application that exercises and demonstrates all the code from the database's _Drive Management_ category.
+Contains the _TestDriveCat_[^2] project that implements a GUI application that exercises and demonstrates all the code from the database's _Drive Management_ category.
 
 ### `./Cat-Hex`
 
-Contains the _TestHexCat_[[2]](#2) project that provides _DUnit_ tests for all the snippets from the database's _Hex Utilities_ category.
+Contains the _TestHexCat_[^2] project that provides _DUnit_ tests for all the snippets from the database's _Hex Utilities_ category.
 
 ### `./Cat-Maths`
 
-Contains the _TestCatMaths_[[2]](#2) project that provides _DUnit_ tests for selected snippets from the database's _Mathematics_ category.
+Contains the _TestCatMaths_[^2] project that provides _DUnit_ tests for selected snippets from the database's _Mathematics_ category.
 
 ### `./Cat-String`
 
-Contains the _TestCatString_[[2]](#2) project that provides _DUnit_ tests for selected snippets from the database's _String Management_ category.
+Contains the _TestCatString_[^2] project that provides _DUnit_ tests for selected snippets from the database's _String Management_ category.
 
 ### `./Cat-WinSys`
 
-Contains the _TextWinSysCat_[[2]](#2) project that provides a GUI application that exercises and demonstrates all the code from the database's _Windows System_ category.
+Contains the _TextWinSysCat_[^2] project that provides a GUI application that exercises and demonstrates all the code from the database's _Windows System_ category.
 
 ### History
 
 These test files originated as a [zip file on Google Drive](https://drive.google.com/file/d/1pH7LtyZY-ehwjJ4AjC801j-0bVMdLpsz/view) that were transferred to the `delphidabbler/code-snippets` repository on GitHub. The tests are located in the repository's `tests` sub-directory.
 
 All subsequent changes to the files were made on GitHub. At present the GitHub repository differs from the original code on Google Drive.
 
-## Notes
+[^1]: There are different versions of the group project file for different Delphi versions: `CodeSnippetsTestsbdsgroup` for Delphi 2006, `CodeSnippetsTests.groupproj` for Delphi 2007-2010 and `CodeSnippetsTestsXE.groupproj` for Delphi XE.
 
-### 1
-
-There are different versions of the group project file for different Delphi versions:
-
-* `CodeSnippetsTestsbdsgroup` for Delphi 2006
-* `CodeSnippetsTests.groupproj` for Delphi 2007-2010
-* `CodeSnippetsTestsXE.groupproj` for Delphi XE
-
-### 2
-
-The are different versions of project files for different versions of Delphi. They are:
-
-* `<NAME>.bdsproj` for Delphi 2006
-* `<NAME>.dproj` for Delphi 2007 to 2010
-* `<NAME>XE.dproj` for Delphi XE
-
-where `<NAME>` is the base name of the project, for example `TestDateCat` or `TestCatMaths`.
-
-> Not all test projects provide all the different project files versions.
+[^2]: There are different versions of project files for different Delphi versions. They are one or more of `<NAME>.bdsproj` for Delphi 2006, `<NAME>.dproj` for Delphi 2007 to 2010 and `<NAME>XE.dproj` for Delphi XE,  where `<NAME>` is the base name of the project, for example `TestDateCat` or `TestCatMaths`.