Preprend regex string literals with an 'r' making them raw strings

autodoist.py

@@ -683,8 +683,8 @@ def remove_label(task, label, overview_task_ids, overview_task_labels):
 def check_header(api, model):
     header_all_in_level = False
     unheader_all_in_level = False
-    regex_a = '(^[*]{2}\s*)(.*)'
-    regex_b = '(^\-\*\s*)(.*)'
+    regex_a = r'(^[*]{2}\s*)(.*)'
+    regex_b = r'(^\-\*\s*)(.*)'
 
     try:
         if isinstance(model, Task):
@@ -1366,7 +1366,7 @@ def autodoist_magic(args, api, connection):
                     # If start-date has not passed yet, remove label
                     try:
                         f1 = re.search(
-                            'start=(\d{2}[-]\d{2}[-]\d{4})', task.content)
+                            r'start=(\d{2}[-]\d{2}[-]\d{4})', task.content)
                         if f1:
                             start_date = f1.groups()[0]
                             start_date = datetime.strptime(
@@ -1389,7 +1389,7 @@ def autodoist_magic(args, api, connection):
                     if task.due is not None:
                         try:
                             f2 = re.search(
-                                'start=due-(\d+)([dw])', task.content)
+                                r'start=due-(\d+)([dw])', task.content)
 
                             if f2:
                                 offset = f2.groups()[0]