Antoine Pitrou added the comment:
It may be unexpected, but it's not a bug. From the documentation:
"""Return a copy of the string with trailing characters removed. The chars
argument is a string specifying the set of characters to be removed. If omitted
or None, the chars argument defaults to
New submission from Szieberth Ádám:
I just faced the following bug (v3.4.2):
>>> t1 = '#5 amarg (Concession)'
>>> t2 = '#6 ironman (Concession)'
>>> s = ' (Concession)'
>>> t1.rstrip(s)
'#5 amarg'
>>> t2.rstrip(s)
'#6 ironma'
>>> t1[:-len(s)]
'#5 amarg'
>>> t2[:-len(s)]
'#6 ironman'
--
