(core) explicitly encode __str__ printout as utf-8 to help Windows …

…compatibility

pysipfenn/core/pysipfenn.py

@@ -110,7 +110,7 @@ def __str__(self):
         """Prints the status of the ``Calculator`` object."""
         printOut = f'pySIPFENN Calculator Object. Version: {__version__}\n'
         printOut += f'Models are located in:\n   {resources.files("pysipfenn.modelsSIPFENN")}\n'
-        printOut += f'Auxiliary files (incl. structure prototypes):\n   {resources.files("pysipfenn.misc")}\n{"-" * 80}\n'
+        printOut += f'Auxiliary files (incl. structure prototypes):\n   {resources.files("pysipfenn.misc")}\n{"-"*80}\n'
         printOut += f'Loaded Networks: {list(self.loadedModels.keys())}\n'
         if len(self.inputFiles) > 0:
             printOut += f'Last files selected as input: {len(self.inputFiles)}\n'
@@ -123,7 +123,7 @@ def __str__(self):
         if len(self.predictions) > 0:
             printOut += f'Last prediction run on: {len(self.predictions)} structures\n'
             printOut += f'                        {len(self.predictions[0])} predictions/structure\n'
-        return printOut
+        return printOut.encode('utf-8')
 
     # *********************************  PROTOTYPE HANDLING  *********************************
     def parsePrototypeLibrary(self,