Documentation / git-stage.txton commit check stderr with isatty() instead of stdout when deciding to show progress (486a3d7)
   1git-stage(1)
   2==============
   3
   4NAME
   5----
   6git-stage - Add file contents to the staging area
   7
   8
   9SYNOPSIS
  10--------
  11[verse]
  12'git stage' args...
  13
  14
  15DESCRIPTION
  16-----------
  17
  18This is a synonym for linkgit:git-add[1].  Please refer to the
  19documentation of that command.