Correct docstrings in cosmology.py

sphinx_documentation/mycosmo/cosmology.py

@@ -39,7 +39,7 @@ def hubble(redshift, cosmo_dict):
         H(z) = \sqrt{H_0^2 (\Omega_{m,0}(1+z)^3 + \Omega_{k,0}(1+z)^2 +
             \Omega_{\Lambda,0})}
 
-    Example
+    Examples
     -------
     >>> from mycosmo.cosmology import hubble
     >>> cosmo_dict = {"H0": 70, "omega_m_0": 0.3, "omega_k_0": 0.0, "omega_lambda_0": 0.7}
@@ -87,7 +87,7 @@ def critical_density(redshift, cosmo_dict):
 
         \rho_c(z) = \frac{3H^2(z)}{8\pi G}
 
-    Example
+    Examples
     -------
     >>> from mycosmo.cosmology import critical_density
     >>> cosmo_dict = {"H0": 70, "omega_m_0": 0.3, "omega_k_0": 0.0, "omega_lambda_0": 0.7}