99.1 Write a feature and then merge its branch to master

# create and checkout the feature

git checkout -b greatfeaturebranch

# implement the cool feature 1

git commit -m "Cool feature 1"

# implement the cool feature 2

git commit -m "Cool feature 2"

# Switch back to the master branch

git checkout master

git merge greatfeaturebranch

# optionally- delete the branch

git branch -d greatfeaturebranch