C#: Add Increment/Decrement instance operator test example and update test expected output.

Author: michaelnebel

csharp/ql/test/library-tests/operators/Operators3.expected

@@ -1 +1 @@
-| operators.cs:96:32:96:39 | implicit conversion |
+| operators.cs:118:36:118:43 | implicit conversion |

csharp/ql/test/library-tests/operators/Operators4.expected

@@ -1 +1 @@
-| operators.cs:101:32:101:39 | explicit conversion |
+| operators.cs:123:36:123:43 | explicit conversion |

csharp/ql/test/library-tests/operators/Operators5.expected

@@ -1,15 +1,15 @@
-| operators.cs:23:30:23:31 | += | operators.cs:61:13:61:22 | ... += ... |
-| operators.cs:31:38:31:39 | checked += | operators.cs:77:17:77:26 | ... += ... |
-| operators.cs:33:38:33:39 | checked -= | operators.cs:78:17:78:26 | ... -= ... |
-| operators.cs:34:30:34:31 | -= | operators.cs:64:13:64:22 | ... -= ... |
-| operators.cs:36:38:36:39 | checked *= | operators.cs:79:17:79:26 | ... *= ... |
-| operators.cs:37:30:37:31 | *= | operators.cs:65:13:65:22 | ... *= ... |
-| operators.cs:39:38:39:39 | checked /= | operators.cs:80:17:80:26 | ... /= ... |
-| operators.cs:40:30:40:31 | /= | operators.cs:66:13:66:22 | ... /= ... |
-| operators.cs:42:30:42:31 | %= | operators.cs:67:13:67:22 | ... %= ... |
-| operators.cs:43:30:43:31 | &= | operators.cs:68:13:68:22 | ... &= ... |
-| operators.cs:44:30:44:31 | \|= | operators.cs:69:13:69:22 | ... \|= ... |
-| operators.cs:45:30:45:31 | ^= | operators.cs:70:13:70:22 | ... ^= ... |
-| operators.cs:46:30:46:32 | <<= | operators.cs:71:13:71:23 | ... <<= ... |
-| operators.cs:47:30:47:32 | >>= | operators.cs:72:13:72:23 | ... >>= ... |
-| operators.cs:48:30:48:33 | >>>= | operators.cs:73:13:73:24 | ... >>>= ... |
+| operators.cs:23:30:23:31 | += | operators.cs:70:13:70:22 | ... += ... |
+| operators.cs:31:38:31:39 | checked += | operators.cs:86:17:86:26 | ... += ... |
+| operators.cs:33:38:33:39 | checked -= | operators.cs:87:17:87:26 | ... -= ... |
+| operators.cs:34:30:34:31 | -= | operators.cs:73:13:73:22 | ... -= ... |
+| operators.cs:36:38:36:39 | checked *= | operators.cs:88:17:88:26 | ... *= ... |
+| operators.cs:37:30:37:31 | *= | operators.cs:74:13:74:22 | ... *= ... |
+| operators.cs:39:38:39:39 | checked /= | operators.cs:89:17:89:26 | ... /= ... |
+| operators.cs:40:30:40:31 | /= | operators.cs:75:13:75:22 | ... /= ... |
+| operators.cs:42:30:42:31 | %= | operators.cs:76:13:76:22 | ... %= ... |
+| operators.cs:43:30:43:31 | &= | operators.cs:77:13:77:22 | ... &= ... |
+| operators.cs:44:30:44:31 | \|= | operators.cs:78:13:78:22 | ... \|= ... |
+| operators.cs:45:30:45:31 | ^= | operators.cs:79:13:79:22 | ... ^= ... |
+| operators.cs:46:30:46:32 | <<= | operators.cs:80:13:80:23 | ... <<= ... |
+| operators.cs:47:30:47:32 | >>= | operators.cs:81:13:81:23 | ... >>= ... |
+| operators.cs:48:30:48:33 | >>>= | operators.cs:82:13:82:24 | ... >>>= ... |