init command duplicates node_modules gitignore entry

[namoscato]

Describe the issue that you're seeing. Any Loom videos or screenshots usually help a lot!

checkGitignoreForNodeModules is not properly accounting for scenarios in which the node_modules gitignore entry is prefixed and/or suffixed with a forward slash.

Reproduction

https://github.com/namoscato/todaypgh

Steps to reproduce

1. given an existing repository with .gitignore, i.e.

   /node_modules/
   

2. run npx @tinacms/cli@latest init

3. see that node_modules entry is incorrectly added

System Info

System:
    OS: macOS 13.1
    CPU: (8) arm64 Apple M1 Pro
    Memory: 159.88 MB / 16.00 GB
    Shell: 3.2.57 - /bin/bash
  Binaries:
    Node: 16.17.0 - ~/.nvm/versions/node/v16.17.0/bin/node
    Yarn: 1.22.19 - ~/dev/git/todaypgh/node_modules/.bin/yarn
    npm: 8.15.0 - ~/.nvm/versions/node/v16.17.0/bin/npm
  Browsers:
    Chrome: 108.0.5359.124
    Chrome Canary: 111.0.5508.0
    Firefox: 104.0.2
    Safari: 16.2
  npmPackages:
    @tinacms/cli: ^1.0.5 => 1.0.5 
    tinacms: ^1.1.2 => 1.1.2

Validations

• Follow our Code of Conduct
• Read the docs.
• Check that there isn't already an issue that reports the same bug.

[jamespohalloran]

To confirm I understand, is the issue that it adds a redundant node_modules, when you already have a /node_modules or /node_modules/ in your .gitignore?

[namoscato]

Yeah, correct. Relatively minor issue but figured I would make a note.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.