update package to use fstrings

spacetelescope / imexam

imexam is a python tool for simple image examination, and plotting, with similar functionality to IRAF's imexamine

http://imexam.readthedocs.io

BSD 3-Clause "New" or "Revised" License

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Open sosey opened 5 years ago

sosey commented 5 years ago

Make sure all the string use is consistent in the pacakge and update to fstrings