Minor correction to DataValidation usage documentation
Created originally on Bitbucket by davur (D)
DataValidation usage documentation has a small error: ValidationType.LIST needs list choices passed into 'formula1' argument. If passed as an unnamed argument it goes into the 'operator' argument (and doesn't work).
In openpyxl / doc / source / usage.rst lines 106-107:
#!python
# Create a data-validation object with list validation
dv = DataValidation(ValidationType.LIST, '"Dog,Cat,Bat"', allow_blank=True)
107 should be:
#!python
dv = DataValidation(ValidationType.LIST, formula1='"Dog,Cat,Bat"', allow_blank=True)