Bug in TH1.py, line 146, in show method

[mostafa1993]

If you have <class 'uproot.rootio.TH2D'> type object, when you try to use the 'show' method, there will be error.
The error is comming from:
TH1.py file line 146:
intervals = ["[{0:<.5g}, {1:<.5g})".format(l, h) for l, h in [self.interval(i) for i in range(len(self))]]

[jpivarski]

uproot-methods is user-contributed. Since you've found the offending line, could you submit a PR?