play-raw: Fix a docstring and add doc

beets/util/__init__.py

@@ -736,7 +736,7 @@ def open_anything():
 
 
 def interactive_open(targets, command=None):
-    """Open the file `target` by `exec`ing a new command. (The new
+    """Open the files in `targets` by `exec`ing a new command. (The new
     program takes over, and Python execution ends: this does not fork a
     subprocess.)
 

docs/plugins/play.rst

@@ -44,6 +44,9 @@ configuration file. The available options are:
   paths to each track on the matched albums. Enable this option to
   store paths to folders instead.
   Default: ``no``.
+- **raw**: Instead of creating a temporary m3u playlist and then opening it,
+  simply call the command with the paths returned by the query as arguments.
+  Default: ``no``.
 
 Optional Arguments
 ------------------