It's not the opinion of "some people", it's a conditional circumstance.
Even proponents of checking node_modules into Git agree that you
shouldn't do it when you're writing a module to be included as a
dependency on npmjs.org: the advantage of checking node_modules
into Git is only for fully-packaged apps, which is why the original
comment was what it was.

Update Umbraco.gitignore

Add sourcemaps to the Sass ignore

Typo in Jetbrains gitignore

When merging branches there are usually conflicts with the CSS sourcemaps. It's not an issue to just recompile the CSS to generate a new sourcemap but having the file ignored helps to save an unnecessary step.

[Tasm] Remove template

[Target3001] Remove template

[Bancha] Remove template

Add *.userosscache to Visual Studio .gitignore

Adding new file generated by the built-in venv module in Python 3

Add .qm files to Momentics.gitignore

Ignores *.xojo_uistate

This is the new file extension for Xojo.

This .gitignore now ignores everything that build clean gets rid of

As described on https://docs.python.org/dev/library/venv.html#creating-virtual-environments

[Global/Quartus2] Remove template

I haven't found good documentation for this file online, but it is a user based file that should be ignored.

Add 'build' directory to Symfony.gitignore

Update Dart.gitignore

Adding additional comments

add the `.pub/` directory, and change the `packages` filter to match sub-folders.

Adding additional comments so that folks know to use the integration tool rather than copying this for better results.

Update Jekyll.gitignore

Create GitBook.gitignore

Ignore user-specific rproj files instead of project-specific ones

Laravel4 is the current standard.

This resolves the name with the custom Laravel.gitignore file in the
gitignore.io project. If support for Laravel3 is desired, it should be done in
a new file: "Laravel3.gitignore

Closes #1196

.Rproj is fine - it's .Rproj.user that needs to go.

[Sublime Text] Adding cache files and binary files

The template hasn't been touched since it was added to this collection.
There are some problems with it - mainly that it's hard to know if these
rules are all still relevant, and the large prose block is probably more
confusing than helpful here.

add downloads/ in Distribution / packaging

Add .gitignore rules for Symfony3

The templare hasn't been touched since it was added and the project itself
hasn't been updated much since then either:

  http://docs.getbancha.com/basic/changelog.html
  https://github.com/squallstar/bancha/commits/master