Merge branch 'jc/doc-hash-object-types'

Doc update.

* jc/doc-hash-object-types:
  docs: add git hash-object -t option's possible values

Documentation/git-hash-object.txt

@@ -3,7 +3,7 @@ git-hash-object(1)
 
 NAME
 ----
-git-hash-object - Compute object ID and optionally creates a blob from a file
+git-hash-object - Compute object ID and optionally create an object from a file
 
 
 SYNOPSIS
@@ -25,7 +25,8 @@ OPTIONS
 -------
 
 -t <type>::
-	Specify the type (default: "blob").
+	Specify the type of object to be created (default: "blob"). Possible
+	values are `commit`, `tree`, `blob`, and `tag`.
 
 -w::
 	Actually write the object into the object database.