Doc: Example of merging Dataframe and Series
- [ ] closes #12550
@pdpark you seem to picking up *other* PR's commits. start with a fresh master and checkout a branch from that with your changes. @jreback, sorry, still learning the process. So I make a branch for a change, commit my changes on my fork and submit a PR. How do I get a fresh master on my fork at that point? Thanks. Looking at the How to Contribute document, it looks like I need to execute these git commands:

git remote add upstream <link to parent repo>
git fetch upstream
git rebase upstream/master Submitted a new pull request. Let me know if it looks okay this time. This PR can be closed. I am resubmitting these changes as separate PRs.