Python: Accept changes to .expected from more pathlib flow

But we don't want to keep this, this commit is just to show why we need a fix :)

Author: RasmusWL

python/ql/test/library-tests/frameworks/stdlib-py3/FileSystemAccess.py

@@ -13,7 +13,7 @@
 
 p.write_bytes(b"hello")  # $ getAPathArgument=p fileWriteData=b"hello"
 p.write_text("hello")  # $ getAPathArgument=p fileWriteData="hello"
-p.open("wt").write("hello")  # $ getAPathArgument=p fileWriteData="hello"
+p.open("wt").write("hello")  # $ getAPathArgument=p fileWriteData="hello" SPURIOUS: getAPathArgument=self
 
 name = windows.parent.name
 o = open

python/ql/test/query-tests/Security/CWE-312-CleartextStorage-py3/CleartextStorage.expected

@@ -1,14 +1,21 @@
 edges
+| file:///usr/lib/python3.8/pathlib.py:1248:26:1248:29 | ControlFlowNode for data | file:///usr/lib/python3.8/pathlib.py:1256:28:1256:31 | ControlFlowNode for data |
+| test.py:9:12:9:21 | ControlFlowNode for get_cert() | test.py:12:21:12:24 | ControlFlowNode for cert |
 | test.py:9:12:9:21 | ControlFlowNode for get_cert() | test.py:12:21:12:24 | ControlFlowNode for cert |
 | test.py:9:12:9:21 | ControlFlowNode for get_cert() | test.py:13:22:13:41 | ControlFlowNode for Attribute() |
 | test.py:9:12:9:21 | ControlFlowNode for get_cert() | test.py:15:26:15:29 | ControlFlowNode for cert |
+| test.py:12:21:12:24 | ControlFlowNode for cert | file:///usr/lib/python3.8/pathlib.py:1248:26:1248:29 | ControlFlowNode for data |
 nodes
+| file:///usr/lib/python3.8/pathlib.py:1248:26:1248:29 | ControlFlowNode for data | semmle.label | ControlFlowNode for data |
+| file:///usr/lib/python3.8/pathlib.py:1256:28:1256:31 | ControlFlowNode for data | semmle.label | ControlFlowNode for data |
 | test.py:9:12:9:21 | ControlFlowNode for get_cert() | semmle.label | ControlFlowNode for get_cert() |
 | test.py:12:21:12:24 | ControlFlowNode for cert | semmle.label | ControlFlowNode for cert |
+| test.py:12:21:12:24 | ControlFlowNode for cert | semmle.label | ControlFlowNode for cert |
 | test.py:13:22:13:41 | ControlFlowNode for Attribute() | semmle.label | ControlFlowNode for Attribute() |
 | test.py:15:26:15:29 | ControlFlowNode for cert | semmle.label | ControlFlowNode for cert |
 subpaths
 #select
+| file:///usr/lib/python3.8/pathlib.py:1256:28:1256:31 | ControlFlowNode for data | test.py:9:12:9:21 | ControlFlowNode for get_cert() | file:///usr/lib/python3.8/pathlib.py:1256:28:1256:31 | ControlFlowNode for data | This expression stores $@ as clear text. | test.py:9:12:9:21 | ControlFlowNode for get_cert() | sensitive data (certificate) |
 | test.py:12:21:12:24 | ControlFlowNode for cert | test.py:9:12:9:21 | ControlFlowNode for get_cert() | test.py:12:21:12:24 | ControlFlowNode for cert | This expression stores $@ as clear text. | test.py:9:12:9:21 | ControlFlowNode for get_cert() | sensitive data (certificate) |
 | test.py:13:22:13:41 | ControlFlowNode for Attribute() | test.py:9:12:9:21 | ControlFlowNode for get_cert() | test.py:13:22:13:41 | ControlFlowNode for Attribute() | This expression stores $@ as clear text. | test.py:9:12:9:21 | ControlFlowNode for get_cert() | sensitive data (certificate) |
 | test.py:15:26:15:29 | ControlFlowNode for cert | test.py:9:12:9:21 | ControlFlowNode for get_cert() | test.py:15:26:15:29 | ControlFlowNode for cert | This expression stores $@ as clear text. | test.py:9:12:9:21 | ControlFlowNode for get_cert() | sensitive data (certificate) |