composer update

vendor/gitonomy/gitlib/doc/api/workingcopy.rst

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+Working copy
+============
+
+Working copy is the folder associated to a git repository. In *gitlib*, you
+can access this object using the *getWorkingCopy* on a *Repository* object:
+
+.. code-block:: php
+
+    $repo = new Repository('/path/to/working-dir');
+    $wc = $repo->getWorkingCopy();
+
+Checkout a revision
+-------------------
+
+You can checkout any revision using *checkout* method. You can also pass a
+second argument, which will be passed as argument with ``-b``:
+
+.. code-block:: php
+
+    // git checkout master
+    $wc->checkout('master');
+
+    // git checkout origin/master -b master
+    $wc->checkout('origin/master', 'master');
+
+You can also pass a *Reference* or a *Commit*.
+
+Staged modifications
+--------------------
+
+You can get a diff of modifications pending in staging area. To get the ``Diff`` object,
+call method ``getDiffStaged()``:
+
+.. code-block:: php
+
+    $diff = $wc->getDiffStaged();
+
+Pending modifications
+---------------------
+
+You can get pending modifications on tracked files by calling method ``getDiffPending()``:
+
+.. code-block:: php
+
+    $diff = $wc->getDiffPending();