Regular expression strings are not explicitly defined as raw strings. This
causes modern python versions (tested with 3.12) to trigger warnings/errors.

See-also: https://github.com/OpenModelica/OpenModelica/issues/12757
--- a/OMSens/analysis/indiv_sens.py
+++ b/OMSens/analysis/indiv_sens.py
@@ -323,8 +323,8 @@ def slugify(value):
     and converts spaces to hyphens.
     """
     value = unicodedata.normalize('NFKD', value)
-    value = re.sub('[^\w\s-]', '', value).strip().lower()
-    value = re.sub('[-\s]+', '-', value)
+    value = re.sub(r'[^\w\s-]', '', value).strip().lower()
+    value = re.sub(r'[-\s]+', '-', value)
     return value
 
 
--- a/OMSens/modelica_interface/run_omc.py
+++ b/OMSens/modelica_interface/run_omc.py
@@ -36,7 +36,8 @@ def writeOMCLog(log_str, output_path):
     final_str = intro_str+separator_str+log_str
     filesystem.files_aux.writeStrToFile(final_str,output_path)
     return 0
+
 def removeTemporaryFiles(folder_path):
-    regex = '.*\.(c|o|h|makefile|log|libs|json)$'
+    regex = r'.*\.(c|o|h|makefile|log|libs|json)$'
     filesystem.files_aux.removeFilesWithRegexAndPath(regex,folder_path)