Merge branch 'tb/checkout-doc' into maint

Doc update.

* tb/checkout-doc:
  git-checkout.txt: document "git checkout <pathspec>" better
diff --git a/Documentation/git-checkout.txt b/Documentation/git-checkout.txt
index d504108..7540e02 100644
--- a/Documentation/git-checkout.txt
+++ b/Documentation/git-checkout.txt
@@ -3,7 +3,7 @@
 
 NAME
 ----
-git-checkout - Checkout a branch or paths to the working tree
+git-checkout - Switch branches or restore working tree files
 
 SYNOPSIS
 --------
@@ -89,6 +89,10 @@
 	(i.e.  commit, tag or tree) to update the index for the given
 	paths before updating the working tree.
 +
+'git checkout' with <paths> or `--patch` is used to restore modified or
+deleted paths to their original contents from the index or replace paths
+with the contents from a named <tree-ish> (most often a commit-ish).
++
 The index may contain unmerged entries because of a previous failed merge.
 By default, if you try to check out such an entry from the index, the
 checkout operation will fail and nothing will be checked out.