Removed unneeded escapes in regular expressions

Author: kmvanbrunt

cmd2/parsing.py

@@ -34,12 +34,12 @@ class MacroArg:
     # Pattern used to find normal argument
     # Digits surrounded by exactly 1 brace on a side and 1 or more braces on the opposite side
     # Match strings like: {5}, {{{{{4}, {2}}}}}
-    macro_normal_arg_pattern = re.compile(r'(?<!\{)\{\d+\}|\{\d+\}(?!\})')
+    macro_normal_arg_pattern = re.compile(r'(?<!{){\d+}|{\d+}(?!})')
 
     # Pattern used to find escaped arguments
     # Digits surrounded by 2 or more braces on both sides
     # Match strings like: {{5}}, {{{{{4}}, {{2}}}}}
-    macro_escaped_arg_pattern = re.compile(r'\{{2}\d+\}{2}')
+    macro_escaped_arg_pattern = re.compile(r'{{2}\d+}{2}')
 
     # Finds a string of digits
     digit_pattern = re.compile(r'\d+')

cmd2/utils.py

@@ -229,7 +229,7 @@ def natural_keys(input_str: str) -> List[Union[int, str]]:
     :param input_str: string to convert
     :return: list of strings and integers
     """
-    return [try_int_or_force_to_lower_case(substr) for substr in re.split('(\d+)', input_str)]
+    return [try_int_or_force_to_lower_case(substr) for substr in re.split(r'(\d+)', input_str)]
 
 
 def natural_sort(list_to_sort: Iterable[str]) -> List[str]: