update docstring
update docstring

fahhem/openhtf,ShaperTools/openhtf,google/openhtf,jettisonjoe/openhtf,fahhem/openhtf,jettisonjoe/openhtf,google/openhtf,amyxchen/openhtf,ShaperTools/openhtf,fahhem/openhtf,grybmadsci/openhtf,amyxchen/openhtf,grybmadsci/openhtf,google/openhtf,jettisonjoe/openhtf,fahhem/openhtf,ShaperTools/openhtf,ShaperTools/openhtf,grybmadsci/openhtf,google/openhtf,grybmadsci/openhtf,jettisonjoe/openhtf,ShaperTools/openhtf