Modify Bubble Sort in Commodore Basic

[rzuckerm]

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I Am Modifying an Existing Code Snippet or Existing Tests

• I fixed Modify Bubble Sort in Commodore Basic #3735
• 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 am the original author, and I realized that I had implemented the algorithm incorrectly. I found that input like "1, 2, 4, 3" would remain unsorted.

[jrg94]

I'm not knowledgeable enough to understand exactly what this improves, but it looks cleaner.

[jrg94]

Oh just saw your note! Okay, I see the issue now.