我做了一个git commit -m "message"，像这样:

> git commit -m "save arezzo files"
# On branch master
# Changes not staged for commit:
#   (use "git add <file>..." to update what will be committed)
#   (use "git checkout -- <file>..." to discard changes in working directory)
#
#       modified:   arezzo.txt
#       modified:   arezzo.jsp
#
no changes added to commit (use "git add" and/or "git commit -a")

但是之后，当我做git状态时，它显示了相同的修改文件:

> git status
# On branch master
# Changes not staged for commit:
#   (use "git add <file>..." to update what will be committed)
#   (use "git checkout -- <file>..." to discard changes in working directory)
#
#       modified:   arezzo.txt
#       modified:   arezzo.jsp
#
no changes added to commit (use "git add" and/or "git commit -a")

我做错了什么?