os: Rename examples as such.

To not be mixed up with real tests.
2017-10-04 23:37:44 +03:00 · 2017-10-04 23:37:44 +03:00 · 643b1d0fab
commit 643b1d0fab
--- a/os/example_dirs.py
+++ b/os/example_dirs.py
--- a/os/example_fork.py
+++ b/os/example_fork.py
--- a/os/example_fsencode.py
+++ b/os/example_fsencode.py
--- a/os/example_rw.py
+++ b/os/example_rw.py
--- a/os/example_system.py
+++ b/os/example_system.py
--- a/os/example_urandom.py
+++ b/os/example_urandom.py