Only Unix-style line endings are allowed

I am learning a framework recently, after the code is pulled down.

checkstyle kept reporting this error, I was really puzzled and thought of many ways, and finally found that the code pulled down by the git command was different, and downloading the zip archive directly on the web page did not have this problem.

[INFO] --- maven-checkstyle-plugin:2.17:check (checkstyle-check) @ kapua-qa-markers ---
[INFO] There are 2 errors reported by Checkstyle 7.6.1 with checkstyle/kapua.xml ruleset.
[ERROR] pom.xml:[1] (regexp) RegexpMultiline: Only Unix-style line endings are allowed