C#: Accept harmless CFG changes.

Author: aschackmull

csharp/ql/test/library-tests/controlflow/guards/BooleanGuardedExpr.expected

@@ -79,7 +79,7 @@
 | Guards.cs:287:17:287:17 | access to parameter o | Guards.cs:278:13:279:28 | ... => ... | Guards.cs:279:17:279:17 | access to parameter o | false |
 | Guards.cs:287:17:287:17 | access to parameter o | Guards.cs:282:13:283:28 | ... => ... | Guards.cs:283:17:283:17 | access to parameter o | false |
 | Guards.cs:287:17:287:17 | access to parameter o | Guards.cs:284:13:285:28 | ... => ... | Guards.cs:285:17:285:17 | access to parameter o | false |
-| Guards.cs:287:17:287:17 | access to parameter o | Guards.cs:286:13:287:28 | ... => ... | Guards.cs:287:17:287:17 | access to parameter o | true |
+| Guards.cs:334:13:334:15 | access to constant B | Guards.cs:334:13:334:20 | ... => ... | Guards.cs:334:13:334:15 | access to constant B | true |
 | Guards.cs:342:27:342:27 | access to parameter b | Guards.cs:341:20:341:20 | access to parameter b | Guards.cs:341:20:341:20 | access to parameter b | false |
 | Guards.cs:343:31:343:31 | access to local variable s | Guards.cs:342:13:342:21 | ... != ... | Guards.cs:342:13:342:13 | access to local variable s | true |
 | Guards.cs:349:13:349:13 | access to parameter o | Guards.cs:348:13:348:25 | ... is ... | Guards.cs:348:13:348:13 | access to parameter o | true |

csharp/ql/test/library-tests/controlflow/guards/GuardedControlFlowNode.expected

@@ -199,11 +199,10 @@
 | Guards.cs:287:17:287:17 | access to parameter o | Guards.cs:278:13:279:28 | ... => ... | Guards.cs:279:17:279:17 | access to parameter o | false |
 | Guards.cs:287:17:287:17 | access to parameter o | Guards.cs:282:13:283:28 | ... => ... | Guards.cs:283:17:283:17 | access to parameter o | false |
 | Guards.cs:287:17:287:17 | access to parameter o | Guards.cs:284:13:285:28 | ... => ... | Guards.cs:285:17:285:17 | access to parameter o | false |
-| Guards.cs:287:17:287:17 | access to parameter o | Guards.cs:286:13:287:28 | ... => ... | Guards.cs:287:17:287:17 | access to parameter o | true |
 | Guards.cs:287:17:287:28 | call to method ToString | Guards.cs:278:13:279:28 | ... => ... | Guards.cs:279:17:279:28 | call to method ToString | false |
 | Guards.cs:287:17:287:28 | call to method ToString | Guards.cs:282:13:283:28 | ... => ... | Guards.cs:283:17:283:28 | call to method ToString | false |
 | Guards.cs:287:17:287:28 | call to method ToString | Guards.cs:284:13:285:28 | ... => ... | Guards.cs:285:17:285:28 | call to method ToString | false |
-| Guards.cs:287:17:287:28 | call to method ToString | Guards.cs:286:13:287:28 | ... => ... | Guards.cs:287:17:287:28 | call to method ToString | true |
+| Guards.cs:334:13:334:15 | access to constant B | Guards.cs:334:13:334:20 | ... => ... | Guards.cs:334:13:334:15 | access to constant B | true |
 | Guards.cs:342:27:342:27 | access to parameter b | Guards.cs:341:20:341:20 | access to parameter b | Guards.cs:341:20:341:20 | access to parameter b | false |
 | Guards.cs:342:27:342:27 | access to parameter b | Guards.cs:341:20:341:32 | ... ? ... : ... | Guards.cs:341:20:341:20 | access to parameter b | not null |
 | Guards.cs:343:31:343:31 | access to local variable s | Guards.cs:342:13:342:13 | access to local variable s | Guards.cs:342:13:342:13 | access to local variable s | not null |

csharp/ql/test/library-tests/controlflow/guards/GuardedExpr.expected

@@ -199,11 +199,10 @@
 | Guards.cs:287:17:287:17 | access to parameter o | Guards.cs:278:13:279:28 | ... => ... | Guards.cs:279:17:279:17 | access to parameter o | false |
 | Guards.cs:287:17:287:17 | access to parameter o | Guards.cs:282:13:283:28 | ... => ... | Guards.cs:283:17:283:17 | access to parameter o | false |
 | Guards.cs:287:17:287:17 | access to parameter o | Guards.cs:284:13:285:28 | ... => ... | Guards.cs:285:17:285:17 | access to parameter o | false |
-| Guards.cs:287:17:287:17 | access to parameter o | Guards.cs:286:13:287:28 | ... => ... | Guards.cs:287:17:287:17 | access to parameter o | true |
 | Guards.cs:287:17:287:28 | call to method ToString | Guards.cs:278:13:279:28 | ... => ... | Guards.cs:279:17:279:28 | call to method ToString | false |
 | Guards.cs:287:17:287:28 | call to method ToString | Guards.cs:282:13:283:28 | ... => ... | Guards.cs:283:17:283:28 | call to method ToString | false |
 | Guards.cs:287:17:287:28 | call to method ToString | Guards.cs:284:13:285:28 | ... => ... | Guards.cs:285:17:285:28 | call to method ToString | false |
-| Guards.cs:287:17:287:28 | call to method ToString | Guards.cs:286:13:287:28 | ... => ... | Guards.cs:287:17:287:28 | call to method ToString | true |
+| Guards.cs:334:13:334:15 | access to constant B | Guards.cs:334:13:334:20 | ... => ... | Guards.cs:334:13:334:15 | access to constant B | true |
 | Guards.cs:342:27:342:27 | access to parameter b | Guards.cs:341:20:341:20 | access to parameter b | Guards.cs:341:20:341:20 | access to parameter b | false |
 | Guards.cs:342:27:342:27 | access to parameter b | Guards.cs:341:20:341:32 | ... ? ... : ... | Guards.cs:341:20:341:20 | access to parameter b | not null |
 | Guards.cs:343:31:343:31 | access to local variable s | Guards.cs:342:13:342:13 | access to local variable s | Guards.cs:342:13:342:13 | access to local variable s | not null |