# Replacement rules tests
# # ReplaceAll (/.): Replaces parts of an expression according to rules.
# $ wo '{a, b} /. a -> x'
# {x, b}
# # ReplaceRepeated (//.):
# # Repeatedly applies transformation rules until no more changes occur.
# $ wo 'ReplaceRepeated[f[2] -> 2][f[f[f[f[2]]]]]'
# 2
# $ wo 'f[f[f[f[2]]]] //. f[2] -> 2'
# 2