[1822CA] when acquiring a minor, clear graph if home token is not rep…

…laced

Fixes #10151, where the bonus acquisition track step did not have a correct
graph for the acquiring major

lib/engine/game/g_1822/step/minor_acquisition.rb

@@ -218,15 +218,15 @@ def process_choose(action)
                 after_acquire_bank_minor(action.entity)
               else
                 acquire_entity_minor(action.entity, action.choice)
-                after_acquire_entity_minor(action.entity)
+                after_acquire_entity_minor(action.entity, action.choice)
               end
               @acquire_state = :select_minor
               pass!
             end
           end
 
           def after_acquire_bank_minor(entity); end
-          def after_acquire_entity_minor(entity); end
+          def after_acquire_entity_minor(entity, token_choice); end
 
           def entity_connects?(entity, minor)
             if (!minor.owner || minor.owner == @bank) && minor.id == @game.class::MINOR_14_ID

lib/engine/game/g_1822_ca/step/minor_acquisition.rb

@@ -18,8 +18,12 @@ def after_acquire_bank_minor(entity)
             @round.acquiring_major = entity
           end
 
-          def after_acquire_entity_minor(entity)
+          def after_acquire_entity_minor(entity, token_choice)
             @round.acquiring_major = entity
+
+            # reset graph for the AcquisitionTrack step; when token is replaced
+            # the graph is already reset by the base 1822 step
+            @game.graph.clear_graph_for(entity) if token_choice == 'exchange'
           end
         end
       end