Use raw string for a regex pattern

In recent Python versions, '\d' emits a SyntaxWarning.

Use raw string to treat the backslash in '\d' as a
literal backslash.

Author: tomasr8

SwanSpawner/swanspawner/_gpuinfo.py

@@ -336,7 +336,7 @@ def _process_partitions(self,
         '''
         # Look for MIG partitions in the allocatable resources list
         for resource_name,count in node_status.allocatable.items():
-            m = re.match('nvidia.com/mig-\d+g.(\d+)gb', resource_name) # e.g. nvidia.com/mig-1g.5gb
+            m = re.match(r'nvidia.com/mig-\d+g.(\d+)gb', resource_name) # e.g. nvidia.com/mig-1g.5gb
             if m and int(count) > 0:
                 memory = m.group(1)
                 description = f'{gpu_model} partition ({memory} GB)'

SwanSpawner/swanspawner/swanspawner.py

@@ -391,7 +391,7 @@ async def poll(self):
                 if exit_return_code.isdigit():
                     value_cleaned = exit_return_code
                 else:
-                    result = re.search('ExitCode=(\d+)', exit_return_code)
+                    result = re.search(r'ExitCode=(\d+)', exit_return_code)
                     if not result:
                         raise Exception("unknown exit code format for this Spawner")
                     value_cleaned = result.group(1)