[MRG] debug documentation (#453)

Author: rflamary

docs/source/conf.py

@@ -75,7 +75,8 @@ def __getattr__(cls, name):
     'sphinx.ext.viewcode',
     'sphinx.ext.napoleon',
     'sphinx_gallery.gen_gallery',
-    'myst_parser'
+    'myst_parser',
+    "sphinxcontrib.jquery",
 ]
 
 autosummary_generate = True

ot/optim.py

@@ -93,15 +93,15 @@ def phi(alpha1):
         fc[0] += 1
         alpha10 = nx.from_numpy(alpha1)
         fval = f(xk0 + alpha10 * pk0, *args)
-        if type(fval) is float:
+        if isinstance(fval, float):
             # prevent bug from nx.to_numpy that can look for .cpu or .gpu
             return fval
         else:
             return nx.to_numpy(fval)
 
     if old_fval is None:
         phi0 = phi(0.)
-    elif type(old_fval) is float:
+    elif isinstance(old_fval, float):
         # prevent bug from nx.to_numpy that can look for .cpu or .gpu
         phi0 = old_fval
     else: