"git add" doesn't work in Power Shell

[WeitiHuang]

C:\GitHub\github-for-developers-sept-2015 [master +0 ~2 -0]> git status
# On branch master
# Your branch is behind 'origin/master' by 27 commits, and can be fast-forwarded
.
#   (use "git pull" to update your local branch)
#
# 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:   README.md
#       modified:   another file
#
no changes added to commit (use "git add" and/or "git commit -a")
C:\GitHub\github-for-developers-sept-2015 [master +0 ~2 -0]> git add README.md
C:\GitHub\github-for-developers-sept-2015 [master +0 ~2 -0]> git add '.\Another
file'
C:\GitHub\github-for-developers-sept-2015 [master +0 ~2 -0]> git status
# On branch master
# Your branch is behind 'origin/master' by 27 commits, and can be fast-forwarded
.
#   (use "git pull" to update your local branch)
#
# 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:   README.md
#       modified:   another file
#
no changes added to commit (use "git add" and/or "git commit -a")
C:\GitHub\github-for-developers-sept-2015 [master +0 ~2 -0]>

[nathanv]

@1walterh you don't need to add a file that is tracked by git. It has already been added. The git add command won't do anything. if you touch a new file... you will have to add that.

[patrickmckenna]

@1walterh Odd. What happens if you have the output of git status as shown, type git add ., then run git status again?