Git is a version control system.
Git is free software distributed under the GPL.
Git has a mutable index called stage.
This is a new line.
New line for testing the branch management.
20200713: new line for branch management.
20200713: new line for megering with ff.
20200713: Another try for megering with FF.
20200713: Update on dev track.
20200721: Test for stash function.
20200713: Updating on master track.
20200720: Fix problem on issue-101.