check_header function should signal what is exactly wrong

[boegel]

I got this error when adding bin/vsc_env.py to vsc-config:

test_importscripts (vsc.install.commontest.CommonTest)
Try to import each python script as a module ... INFO: run_tests from base dir /Users/kehoste/work/vsc-config (using executable /Users/kehoste/work/vsc-config/setup.py)
INFO: generated list: ['bin/vsc_env.py']
INFO: generated scripts list: ['bin/vsc_env.py']
INFO: get_header for script
INFO: python in shebang, forcing env python (header modified)
INFO: run_tests from base dir /Users/kehoste/work/vsc-config (using executable /Users/kehoste/work/vsc-config/setup.py)
INFO: found match url [email protected]:hpcugent/vsc-config in /Users/kehoste/work/vsc-config/.git/config
INFO: found match name vsc-config in /Users/kehoste/work/vsc-config/.git/config
INFO: reg found: ('github.com', 'hpcugent/vsc-config')
INFO: get_name_url returns {'url': 'https://github.com/hpcugent/vsc-config', 'name': 'vsc-config', 'download_url': 'https://github.com/hpcugent/vsc-config/archive/ALL_VERSIONS.tar.gz'}
INFO: found license /Users/kehoste/work/vsc-config/LICENSE with md5sum 4c917d76bb092659fa923f457c72d033
INFO: Found license name ARR and classifier License :: Other/Proprietary License
FAIL

The FAIL doesn't give any hint on what is wrong exactly, in the end it turned out that the problem was that /usr/bin/python was being used as shebang line rather than /usr/bin/env python, which is signalled by the python in shebang line above.

Problems like this should stand out better so you don't have to be a detective to figure out what the actual problem is.