Addresses review comments

Author: StephenNneji

ratapi/examples/absorption/volume_thiol_bilayer.py

@@ -138,7 +138,7 @@ def volume_thiol_bilayer(params, bulk_in, bulk_out, contrast):
 
     if contrast == 2 or contrast == 4:
         output = [alloyUp, gold, SAMTAILS, SAMHEAD, CW, *BILAYER]
-    else:
+    elif contrast == 1 or contrast == 3:
         output = [alloyDown, gold, SAMTAILS, SAMHEAD, CW, *BILAYER]
 
     return output, subRough

ratapi/examples/domains/alloy_domains.py

@@ -28,7 +28,7 @@ def alloy_domains(params, bulkIn, bulkOut, contrast, domain):
     # Make the model depending on which domain we are looking at
     if domain == 1:
         output = [alloyUp, gold]
-    else:
+    elif domain == 2:
         output = [alloyDn, gold]
 
     return output, subRough

ratapi/examples/domains/domains_XY_model.py

@@ -42,7 +42,7 @@ def domains_XY_model(params, bulk_in, bulk_out, contrast, domain):
     # Layer SLD depends on whether we are calculating the domain or not
     if domain == 1:
         laySLD = vfLayer * layerSLD
-    else:
+    elif domain == 2:
         laySLD = vfLayer * domainSLD
 
     # ... and finally the water SLD.