Do not escape string containing newline
@@ -322,7 +322,7 @@ class Frequency(object):
"""
increase = npy.diff(self.f) > 0
if not increase.all():
- warnings.warn(r"Frequency values are not monotonously increasing!\n"
+ warnings.warn("Frequency values are not monotonously increasing!\n"
"To get rid of the invalid values call `drop_non_monotonic_increasing`",
InvalidFrequencyWarning)
