Added Python 3.13 test target; trivial cleanup

.github/workflows/tests.yaml

@@ -15,7 +15,7 @@ jobs:
       name: "Run tests with Python ${{ matrix.python-version }} on ${{ matrix.os }}"
       strategy:
         matrix:
-          python-version: [ '3.8', '3.12' ]
+          python-version: [ '3.8', '3.12', '3.13' ]
           os: [ "ubuntu-22.04", "ubuntu-24.04" ]
         fail-fast: false
 

pyswip/core.py

@@ -79,7 +79,6 @@ def _findSwiplFromExec():
     swiHome = None
 
     try:  # try to get library path from swipl executable.
-
         # We may have pl or swipl as the executable
         cmd = Popen(["swipl", "--dump-runtime-variables"], stdout=PIPE)
         ret = cmd.communicate()
@@ -1398,7 +1397,6 @@ def exit(self, code=0):
 def cleanupProlog():
     # only do something if prolog has been initialised
     if PL_is_initialised(None, None):
-
         # clean up the prolog system using the caught exit code
         # if exit code is None, the program exits normally and we can use 0
         # instead.