Offset is empty with usetex when offset is equal to 1

[mdboom]

Example:

from pylab import *
rc('text',usetex=True)
t=arange(1,1+1e-6,1e-7)
f = lambda x: 1e6*(x-1)
plot(t,vectorize(f)(t))
show()

The problem arises in ScalarFormatter._formatSciNotation; a solution could be replacing

if significand == '1':

with

if significand == '1' and not exponent == '':

[mdboom]

Seems like a bonafide bug and a reasonable fix, but I'd like to give others a chance to comment as well.

[dmcdougall]

Yeah, I agree.

@antoinehu Would you be able to create a pull request against the v1.2.x branch?