Python: Fix syntax error locations

python/ql/test/3/library-tests/with/test.py

@@ -0,0 +1,6 @@
+with (
+    CtxManager1() as example1,
+    CtxManager2() as example2,
+    CtxManager3() as example3,
+):
+    pass

python/ql/test/3/library-tests/with/test.ql

@@ -0,0 +1,3 @@
+import python
+
+select any(AstNode n)

python/ql/test/3/query-tests/Imports/syntax_error/SyntaxError.expected

@@ -1 +1 @@
-| nonsense.py:1:2:1:2 | Syntax Error | Syntax Error (in Python 3). |
+| nonsense.py:0:1:0:1 | Syntax Error | Syntax Error (in Python 3). |

python/ql/test/query-tests/Diagnostics/ExtractionWarnings.expected

@@ -1,2 +1,2 @@
 | bad_encoding.py:2:11:2:11 | Encoding Error | Extraction failed in bad_encoding.py with error 'utf-8' codec can't decode byte 0x9d in position 87: invalid start byte | 1 |
-| syntax_error.py:1:31:1:31 | Syntax Error | Extraction failed in syntax_error.py with error Syntax Error | 1 |
+| syntax_error.py:1:1:1:1 | Syntax Error | Extraction failed in syntax_error.py with error Syntax Error | 1 |