projects>git clone git@github.com:jlengstorf/learn-rollup.git
projects>cd learn-rollup/
projects\learn-rollup>npm install
...
projects\learn-rollup>npm run dev
> learn-rollup@0.0.1 dev E:\git\learn-rollup
> rollup -c --watch
checking rollup-watch version...
bundling...
projects\learn-rollup\src\scripts\main.js
1:55 error Expected linebreaks to be 'LF' but found 'CRLF' linebreak-style
2:29 error Expected linebreaks to be 'LF' but found 'CRLF' linebreak-style
3:1 error Expected linebreaks to be 'LF' but found 'CRLF' linebreak-style
4:40 error Expected linebreaks to be 'LF' but found 'CRLF' linebreak-style
5:45 error Expected linebreaks to be 'LF' but found 'CRLF' linebreak-style
6:39 error Expected linebreaks to be 'LF' but found 'CRLF' linebreak-style`
...
36 problems (36 errors, 0 warnings)
I was pretty much following the readme