Miscellaneous test fixes. (#35301)

* Add missing pylint test for invalid path.
* Fix syntax in integration test.
* Use Write-Output in win_script test script.
* Fix pylint in explain mode.

test/integration/targets/uri/files/testserver.ps1

@@ -1,5 +1,5 @@
 param (
-    [int]$port = 8000,
+    [int]$port = 8000
 )
 
 $listener = New-Object Net.HttpListener

test/integration/targets/win_script/files/space path/test_script.ps1

@@ -1 +1 @@
-Write-Host "Ansible supports spaces in the path to the script."
+Write-Output "Ansible supports spaces in the path to the script."

test/runner/lib/sanity/pylint.py

@@ -91,6 +91,10 @@ class PylintTest(SanitySingleVersion):
 
                 path, code = ignore_entry.split(' ', 1)
 
+                if not os.path.exists(path):
+                    invalid_ignores.append((line, 'Remove "%s" since it does not exist' % path))
+                    continue
+
                 if ' ' in code:
                     code, version = code.split(' ', 1)
 
@@ -161,6 +165,9 @@ class PylintTest(SanitySingleVersion):
             code=m['symbol'],
         ) for m in messages]
 
+        if args.explain:
+            return SanitySuccess(self.name)
+
         line = 0
 
         filtered = []