changed output of debug messages to say "path" or "file"
extended test for filtering  certain files in a package
added test for filtering files in a python dir (no package)

This should have no effect, it's a "shouldn't happe" case.
Also tidied up some comments.

Without ERR_load_crypto_strings() functions like ERR_lib_error_string() return NULL.

Issue #19030: final pieces for proper location of various class attributes located in the metaclass.

Okay, hopefully the very last patch for this issue.  :/

I realized when playing with Enum that the metaclass attributes weren't always displayed properly.

New patch properly locates DynamicClassAttributes, virtual class attributes (returned by __getattr__ and friends), and metaclass class attributes (if they are also in the metaclass __dir__ method).

Also had to change one line in pydoc to get this to work.

Added tests in test_inspect and test_pydoc to cover these situations.

those in the same process group.

limiting the call to readline().  Original patch by Michał
Jastrzębski and Giampaolo Rodola.