Fix duplicated signatures.

Eclipse PyDev code analysis is pointing those out.
Fix indentation to multiple of 4
Remove a few statements that have no effect
replace coords test_api.py removals with correct asserts
Merge pull request #1 from eteq/cdeil-eclipse-fix-coordtests

replace coords test_api.py removals with correct asserts
Add missing assert in vo_test
Merge pull request #943 from cdeil/eclipse

Minor cleanup suggested by Eclipse PyDev code analysis