Change master branch to main in README
drj@pobox.com
-[![Build Status](https://travis-ci.org/drj11/pypng.svg?branch=master)](https://travis-ci.org/drj11/pypng)
+[![Build Status](https://travis-ci.org/drj11/pypng.svg?branch=main)](https://travis-ci.org/drj11/pypng)
# INTRODUCTION
@@ -52,7 +52,7 @@ your application and distribute it.
The following `curl` command should copy the latest version into
your current directory:
- curl -LO https://raw.github.com/drj11/pypng/master/code/png.py
+ curl -LO https://raw.github.com/drj11/pypng/main/code/png.py
## RELEASE NOTES
