Modernize usage of re.sub deprecated in Python 3.13

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>

scripts/assemble_changelog.py

@@ -143,7 +143,7 @@ class TextChangelogFormat(ChangelogFormat):
 
     @classmethod
     def version_title_text(cls, version_title):
-        return re.sub(r'\n.*', version_title, re.DOTALL)
+        return re.sub(r'\n.*', version_title, flags=re.DOTALL)
 
     _category_title_re = re.compile(r'(^\w.*)\n+', re.MULTILINE)
     @classmethod

scripts/generate_test_code.py

@@ -762,7 +762,7 @@ def escaped_split(inp_str, split_char):
         raise ValueError('Expected split character. Found string!')
     out = re.sub(r'(\\.)|' + split_char,
                  lambda m: m.group(1) or '\n', inp_str,
-                 len(inp_str)).split('\n')
+                 count=len(inp_str)).split('\n')
     out = [x for x in out if x]
     return out
 

scripts/mbedtls_framework/c_wrapper_generator.py

@@ -359,7 +359,7 @@ class Base:
         """Preprocessor symbol used as a guard against multiple inclusion."""
         # Heuristic to strip irrelevant leading directories
         filename = re.sub(r'.*include[\\/]', r'', filename)
-        return re.sub(r'[^0-9A-Za-z]', r'_', filename, re.A).upper()
+        return re.sub(r'[^0-9A-Za-z]', r'_', filename, flags=re.A).upper()
 
     def write_h_file(self, filename: str) -> None:
         """Output a header file with function wrapper declarations and macro definitions."""