Make BPythonFormatter.f_strings an instance (not class) attribute.
Make BPythonFormatter.f_strings an instance (not class) attribute.

Having this as a class attribute means you can only use one
color_scheme per session, which could be considered a bug.

kdart/bpython,kdart/bpython,aktorion/bpython,aktorion/bpython,wevial/bpython,wevial/bpython