Correct typo in harmonic oscillator period docstring
@@ -658,7 +658,7 @@ class HarmonicOscillator(TestSystem):
Notes
-----
- The natural period of a harmonic oscillator is T = sqrt(m/K), so you will want to use an
+ The natural period of a harmonic oscillator is T = 2*pi*sqrt(m/K), so you will want to use an
integration timestep smaller than ~ T/10.
The standard deviation in position in each dimension is sigma = (kT / K)^(1/2)
