fix E221 pep8 errors
fix E222 pep8 errors

Signed-off-by: Thomas Hisch <t.hisch@gmail.com>
fix E201 and E202 pep8 errors

Signed-off-by: Thomas Hisch <t.hisch@gmail.com>
Merge pull request #3635 from thisch/examples_pep8_e201_202_e221_222

PEP8 : fix pep8 error classes e20[12] and e22[12] in examples