Markdown formatting

[mwunderl]

Issue #, if available: #19

Description of changes: Address tilde and quote usage issues in markdown tutorial files and instructions.

prompts used

several of the markdown files in this directory's folders contain tilde ~ characters . Sometimes they mean "about" in which case they should be replaced with the word they represent, and in other cases they are in code examples where they can mean "home" in linux. There may be other uses. In code examples the code block or inline code should be properly formatted, otherwise multiple tildes on the same line will cause the markdown file to render the text between the tilde characters as strikethrough. Review all of the markdown files and make any fixes needed. Check your own work and escalate to me as needed.

review all of the markdown files to ensure that inline commands, code, filepaths are formatted as code with backticks and not using double quotes. remove any redundant quotes.

some files still have code blocks with backticks with extra double quotes around them. audit all inline double quotes

update the agent instructions in ../instra/tutorial-gen steps 3b and 4 to ensure that the tutorials properly use backticks and tildes for new tutorials

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[yanjieniu]

Looks good. Approve.