MAINT: unify error messages

Author: mattip

numpy/core/src/common/ufunc_override.c

@@ -97,7 +97,7 @@ PyUFuncOverride_GetOutObjects(PyObject *kwds, PyObject **out_kwd_obj, PyObject *
          * The C-API recommends calling PySequence_Fast before any of the other
          * PySequence_Fast* functions. This is required for PyPy
          */
-        PyObject *seq = PySequence_Fast(*out_kwd_obj, "cannot convert");
+        PyObject *seq = PySequence_Fast(*out_kwd_obj, "Could not convert object to sequence");
         int ret;
         if (seq == NULL) {
             return -1;

numpy/core/src/multiarray/methods.c

@@ -1011,7 +1011,7 @@ any_array_ufunc_overrides(PyObject *args, PyObject *kwds)
     if (nin < 0) {
         return -1;
     }
-    fast = PySequence_Fast(args, "could not convert args for fast access");
+    fast = PySequence_Fast(args, "Could not convert object to sequence");
     if (fast == NULL) {
         return -1;
     }