Fix misleading naming in test_stokes

Author: inducer

test/test_stokes.py

@@ -365,17 +365,17 @@ def test_exterior_stokes(actx_factory, ambient_dim, method, nu, visualize=False)
             error_format="%.8e",
             eoc_format="%.2f"))
 
-    extra_order = 0
+    orders_lost = 0
     if method == "biharmonic":
-        extra_order += 1
+        orders_lost += 1
     elif nu != 0.5:
-        extra_order += 0.5
+        orders_lost += 0.5
     for eoc in eocs:
         # This convergence data is not as clean as it could be. See
         # https://github.com/inducer/pytential/pull/32
         # for some discussion.
         order = min(target_order, qbx_order)
-        assert eoc.order_estimate() > order - 0.5 - extra_order
+        assert eoc.order_estimate() > order - 0.5 - orders_lost
 
 # }}}