make setup.py more robust to possible errors during version string modification
make setup.py more robust to possible errors during version string modification

gvalentine/pyqtgraph,Lx37/pyqtgraph,carlomt/dicom_tools,JenSte/pyqtgraph,mgraupe/acq4,ericdill/pyqtgraph,pbmanis/acq4,hiuwo/acq4,pmaunz/pyqtgraph,acq4/acq4,acq4/acq4,tropp/acq4,JenSte/pyqtgraph,duguxy/pyqtgraph,derricw/pyqtgraph,ng110/pyqtgraph,tropp/acq4,campagnola/acq4,benvermaercke/pyqtgraph,jlombacher/pyqtgraph,Lx37/pyqtgraph,hiuwo/acq4,welshjf/pyqtgraph,gvalentine/pyqtgraph,ddamiani/pyqtgraph,meganbkratz/acq4,benvermaercke/pyqtgraph,nmearl/pyqtgraph,mgraupe/acq4,welshjf/pyqtgraph,ericdill/pyqtgraph,petebachant/pyqtgraph,campagnola/acq4,pbmanis/acq4,mgraupe/acq4,vallsv/pyqtgraph,onlyjus/pyqtgraph,mpvismer/pyqtgraph,ddamiani/pyqtgraph,ericdill/pyqtgraph,jlombacher/pyqtgraph,petebachant/pyqtgraph,wonkoderverstaendige/MausverPyler,wonkoderverstaendige/MausverPyler,onlyjus/pyqtgraph,campagnola/acq4,onlyjus/pyqtgraph,derricw/pyqtgraph,pbmanis/acq4,tropp/acq4,hiuwo/acq4,benvermaercke/pyqtgraph,tropp/acq4,gvalentine/pyqtgraph,hiuwo/acq4,campagnola/acq4,carlomt/dicom_tools,meganbkratz/acq4,meganbkratz/acq4,ddamiani/pyqtgraph,acq4/acq4,welshjf/pyqtgraph,stscieisenhamer/pyqtgraph,mpvismer/pyqtgraph,ng110/pyqtgraph,mgraupe/acq4,stscieisenhamer/pyqtgraph,pmaunz/pyqtgraph,duguxy/pyqtgraph,hiuwo/acq4,acq4/acq4,nmearl/pyqtgraph,meganbkratz/acq4,pbmanis/acq4,mgraupe/acq4,vallsv/pyqtgraph