Modify Tests in Tex

[rzuckerm]

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Please fill one of the sections below as applicable.
Please also add any other relevant information to the Notes section at the bottom.
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For more information please refer to our contributing documentation

I Am Modifying an Existing Code Snippet or Existing Tests

• I fixed Modify Tex Testing #4414
• I have read about modifying existing code snippets or tests in the contributing documentation
• I have explained why this modification is necessary either in the issue linked above or in the notes below
• I named the pull request using Modify {PROJECT} {tests} in {LANGUAGE} format

Other Notes

I have upgraded Tex to the latest version. I have changed the existing samples to use file I/O to write to a file with the same name at the sample (e.g., hello-world.tex generates hello-world.txt) instead of creating PDF files. This has the advantage of not having to parse and convert PDF files to something more usable. Instead, all that needs to be done is to output the resulting file.

[jrg94]

Looks great! Love this approach to testing.