LC_ALL=C cal 2001

# Here tests with `w` count all occurrences, even when they are on the same line.

$ 7 months have 31 days
w7: 31

# Uppercase modifiers cancel previous modifiers

$ 5 lines have a '31' day
wW5: 31


# Modifiers given through the command line or through !OPTIONS apply to every test.

!OPTIONS: --mod w
LC_ALL=C cal 2001

$ 7 months have 31 days
7: 31

$ 11 months have 30 days or more
11: 30

$ 7 months have a '31' day (W is here overriden by --mod w)
W7: 31