Fix pycodestyle "inalid escape sequence" warnings

debian/bin/gencontrol.py

@@ -624,7 +624,7 @@ class Gencontrol(Base):
             self.abiname_part = '-%s' % self.config['abi', ]['abiname']
         # We need to keep at least three version components to avoid
         # userland breakage (e.g. #742226, #745984).
-        self.abiname_version = re.sub('^(\d+\.\d+)(?=-|$)', r'\1.0',
+        self.abiname_version = re.sub(r'^(\d+\.\d+)(?=-|$)', r'\1.0',
                                       self.version.linux_upstream)
         self.vars = {
             'upstreamversion': self.version.linux_upstream,

debian/bin/kconfig.py

@@ -16,7 +16,7 @@ def merge(output, configs, overrides):
 
 
 def opt_callback_dict(option, opt, value, parser):
-    match = re.match('^\s*(\S+)=(\S+)\s*$', value)
+    match = re.match(r'^\s*(\S+)=(\S+)\s*$', value)
     if not match:
         raise optparse.OptionValueError('not key=value')
     dest = option.dest

debian/changelog

@@ -15,6 +15,7 @@ linux (4.19.12-2) UNRELEASED; urgency=medium
   * debian/lib/python/debian_linux/debian.py: Fix deprecated import of
     MutableSet
   * Fix pycodestyle "line break after binary operator" warnings
+  * Fix pycodestyle "inalid escape sequence" warnings
 
   [ Salvatore Bonaccorso ]
   * USB: hso: Fix OOB memory access in hso_probe/hso_get_config_data

debian/rules.d/scripts/mod/gendef.py

@@ -3,7 +3,7 @@ import re
 import sys
 
 for line in open(sys.argv[1]):
-    match = re.search('getopt\(argc, argv, "([\w:]*?)"\)', line)
+    match = re.search(r'getopt\(argc, argv, "([\w:]*?)"\)', line)
     if match:
         options = match.group(1)
         break