Update docstring and test to match long-standing expectation in behavior.

setuptools/__init__.py

@@ -137,8 +137,9 @@ class Command(_Command):
 distutils.core.Command = Command    # we can't patch distutils.cmd, alas
 
 def findall(dir = os.curdir):
-    """Find all files under 'dir' and return the list of full filenames
-    (relative to 'dir').
+    """
+    Find all files under 'dir' and return the list of full filenames.
+    Unless dir is '.', return full filenames with dir prepended.
     """
     all_files = []
     for base, dirs, files in os.walk(dir, followlinks=True):

setuptools/tests/test_setuptools.py

@@ -14,6 +14,7 @@ def example_source(tmpdir):
 def test_findall(example_source):
     found = list(setuptools.findall(str(example_source)))
     expected = ['readme.txt', 'foo/bar.py']
+    expected = [example_source.join(fn) for fn in expected]
     assert found == expected