Fix docstring for returns

Author: cgalelli

gammapy/estimators/utils.py

@@ -563,7 +563,7 @@ def compute_lightcurve_discrete_correlation(
 
     Returns
     -------
-    bincenters, discrete_correlation, discrete_correlation_err : `~numpy.ndarray`, `~astropy.units.Quantity`
+    bincenters, discrete_correlation, discrete_correlation_err : `~astropy.units.Quantity`, `~numpy.ndarray`, `~numpy.ndarray`
         Array of discrete time bins, discrete correlation function and associated error.
     """
 

gammapy/stats/variability.py

@@ -306,7 +306,7 @@ def discrete_correlation(flux1, flux_err1, flux2, flux_err2, time1, time2, tau,
 
     Returns
     -------
-    bincenters, discrete_correlation, discrete_correlation_err : `~numpy.ndarray`, `~astropy.units.Quantity`
+    bincenters, discrete_correlation, discrete_correlation_err : `~astropy.units.Quantity`, `~numpy.ndarray`, `~numpy.ndarray`
         Array of discrete time bins, discrete correlation function and associated error.
 
     References