Why files appear when doing git checkout my-branch

Question

I would like to know why these files appear after doing git checkout my-branch .

$ git checkout develop
D       sites/all/libraries/google-api-php-client/src/Google/Auth/Abstract.php
D       sites/all/libraries/google-api-php-client/src/Google/Auth/AppIdentity.php
D       sites/all/libraries/google-api-php-client/src/Google/Auth/AssertionCredentials.php
D       sites/all/libraries/google-api-php-client/src/Google/Auth/ComputeEngine.php
D       sites/all/libraries/google-api-php-client/src/Google/Auth/Exception.php
D       sites/all/libraries/google-api-php-client/src/Google/Auth/LoginTicket.php
D       sites/all/libraries/google-api-php-client/src/Google/Auth/OAuth2.php
D       sites/all/libraries/google-api-php-client/src/Google/Auth/Simple.php
Already on 'develop'

Answer 1

这意味着您已删除了一些文件，但未提交这些更改。