Escape single quotes for WSL

[a4lg]

Summary of the Pull Request

This commit escapes single quotes ' (allowed in the Win32 subsystem) with '\'' (finish quote, print a single quote then begin quote again), which is a valid escape in the context of the POSIX shell, when a file/folder is dropped to a WSL tab.

Note: '"'"' on the first submission of this PR.

References and Relevant Issues

• WSL paths need further escape of single quotes #18006
• add single quotes to WSL drag and drop #16214

Detailed Description of the Pull Request / Additional comments

This is a follow-up of #16214 and fixes #18006.

Validation Steps Performed

PR Checklist

• Closes WSL paths need further escape of single quotes #18006
• Tests added/passed
• Documentation updated
  • If checked, please file a pull request on our docs repo and link it here: #xxx
• Schema updated (if necessary)

[a4lg]

@microsoft-github-policy-service agree

[lhecker]

Would it be simpler to paste with double quotes and handle escaping of significant characters like $, ', or " with backspaces?

[a4lg]

@lhecker I would prefer searching for just one character ('), not three (three you mentioned minus ' plus backquote) I guess. Plus, single quote approach makes making mistakes or shell-dependent sequences almost impossible.

The inserting sequence '"'"' is odd (I have to admit) but in both quote cases (double and single), we would not escape so frequently.

[a4lg]

Also, escaping just like @sh formatting logic in jq seems simpler. Will change:

Old: '"'"'
New: '\''

Additional references:

1. POSIX Shell & Utilities: 2.2 Quoting
2. POSIX Shell & Utilities: 2.2.1 Escape Character (Backslash)
3. jq 1.7 Manual: Format strings and escaping (Examples)