dependencies: avoid Package-is-not-iterable in graph_reverse_depends doctest

Dependency is a subclass of Query, so we need to initialize it with a
CPV string, not a Package instance.  The old doctest was raising:

  File ".../pym/gentoolkit/dependencies.py", line 202, in
    gentoolkit.dependencies.Dependencies.graph_reverse_depends
  Failed example:
    deptree = ffmpeg.graph_reverse_depends(
        only_direct=False,  # Include indirect revdeps
        pkgset=installed)   # from installed pkgset
  Exception raised:
    Traceback (most recent call last):
      File "/usr/lib/python3.2/doctest.py", line 1288, in __run
        compileflags, 1), test.globs)
      File "<doctest gentoolkit.dependencies.Dependencies.graph_reverse_depends[5]>", line 3, in <module>
        pkgset=installed)   # from installed pkgset
      File ".../pym/gentoolkit/dependencies.py", line 237, in graph_reverse_depends
        pkgset = tuple(Dependencies(x) for x in pkgset)
      File ".../pym/gentoolkit/dependencies.py", line 237, in <genexpr>
        pkgset = tuple(Dependencies(x) for x in pkgset)
      File ".../pym/gentoolkit/dependencies.py", line 45, in __init__
        Query.__init__(self, query)
      File "/home/wking/src/gentoolkit/pym/gentoolkit/query.py", line 51, in __init__
        if not set(query).intersection(needed_chars):
    TypeError: 'Package' object is not iterable

Also use ffmpeg-9999 (for better future-proofing) and update the
length of the resulting deptree.

1 files changed, 3 insertions, 3 deletions

diff --git a/pym/gentoolkit/dependencies.py b/pym/gentoolkit/dependencies.py
index 726d546..3019a54 100644
--- a/pym/gentoolkit/dependencies.py
+++ b/pym/gentoolkit/dependencies.py
@@ -192,18 +192,18 @@ class Dependencies(Query):
 
 		Example usage:
 			>>> from gentoolkit.dependencies import Dependencies
-			>>> ffmpeg = Dependencies('media-video/ffmpeg-0.5_p20373')
+			>>> ffmpeg = Dependencies('media-video/ffmpeg-9999')
 			>>> # I only care about installed packages that depend on me:
 			... from gentoolkit.helpers import get_installed_cpvs
 			>>> # I want to pass in a sorted list. We can pass strings or
 			... # Package or Atom types, so I'll use Package to sort:
 			... from gentoolkit.package import Package
-			>>> installed = sorted(Package(x) for x in get_installed_cpvs())
+			>>> installed = sorted(get_installed_cpvs())
 			>>> deptree = ffmpeg.graph_reverse_depends(
 			...     only_direct=False,  # Include indirect revdeps
 			...     pkgset=installed)   # from installed pkgset
 			>>> len(deptree)
-			44
+			24
 
 		@type pkgset: iterable
 		@keyword pkgset: sorted pkg cpv strings or anything sublassing