openstreetmap-website

https://github.com/openstreetmap/openstreetmap-website

Ruby

The Rails application that powers OpenStreetMap

DiffReader#check

Checks a few invariants. Others are checked in the model methods
such as save_ and delete_with_history.

Source | Google | Stack overflow

Edit

git clone [email protected]:openstreetmap/openstreetmap-website.git
cd openstreetmap-website
open lib/diff_reader.rb

Contribute

# Make a new branch
git checkout -b -your-name--update-docs-DiffReader-check-for-pr

# Commit to git
git add lib/diff_reader.rbgit commit -m "better docs for DiffReader#check"

# Open pull request
gem install hub # on a mac you can `brew install hub`
hub fork
git push <your name> -your-name--update-docs-DiffReader-check-for-pr
hub pull-request

# Celebrate!