fix doctest'

Author: TomDonoghue

fooof/utils/data.py

@@ -179,7 +179,7 @@ def interpolate_spectra(freqs, powers, interp_range, buffer=3):
     Using simulated spectra, interpolate away line noise peaks:
 
     >>> from fooof.sim import gen_group_power_spectra
-    >>> freqs, powers = gen_power_spectrum(5, [1, 75], [1, 1], [[10, 0.5, 1.0], [60, 2, 0.1]])
+    >>> freqs, powers = gen_group_power_spectra(5, [1, 75], [1, 1], [[10, 0.5, 1.0], [60, 2, 0.1]])
     >>> freqs, powers = interpolate_spectra(freqs, powers, [58, 62])
     """