test/contrib: Fix invalid escapes in regex strings

Flagged by flake8 v3.6.0, as W605, plus a few others identified
incidentally, e.g. 59ffecf66cf4d08c4b431e457b083878d66a3fd6.

Note that r"\n" matches to "\n" under re.match/search.

3 files changed, 6 insertions, 6 deletions

diff --git a/test/lint/check-doc.py b/test/lint/check-doc.py
index 1d6122a13d..bd947d194c 100755
--- a/test/lint/check-doc.py
+++ b/test/lint/check-doc.py
@@ -15,8 +15,8 @@ import re
 
 FOLDER_GREP = 'src'
 FOLDER_TEST = 'src/test/'
-REGEX_ARG = '(?:ForceSet|SoftSet|Get|Is)(?:Bool)?Args?(?:Set)?\("(-[^"]+)"'
-REGEX_DOC = 'AddArg\("(-[^"=]+?)(?:=|")'
+REGEX_ARG = r'(?:ForceSet|SoftSet|Get|Is)(?:Bool)?Args?(?:Set)?\("(-[^"]+)"'
+REGEX_DOC = r'AddArg\("(-[^"=]+?)(?:=|")'
 CMD_ROOT_DIR = '$(git rev-parse --show-toplevel)/{}'.format(FOLDER_GREP)
 CMD_GREP_ARGS = r"git grep --perl-regexp '{}' -- {} ':(exclude){}'".format(REGEX_ARG, CMD_ROOT_DIR, FOLDER_TEST)
 CMD_GREP_WALLET_ARGS = r"git grep --function-context 'void WalletInit::AddWalletOptions' -- {} | grep AddArg".format(CMD_ROOT_DIR)
diff --git a/test/lint/check-rpc-mappings.py b/test/lint/check-rpc-mappings.py
index 137cc82b5d..a33ab17f3f 100755
--- a/test/lint/check-rpc-mappings.py
+++ b/test/lint/check-rpc-mappings.py
@@ -48,13 +48,13 @@ def process_commands(fname):
         for line in f:
             line = line.rstrip()
             if not in_rpcs:
-                if re.match("static const CRPCCommand .*\[\] =", line):
+                if re.match(r"static const CRPCCommand .*\[\] =", line):
                     in_rpcs = True
             else:
                 if line.startswith('};'):
                     in_rpcs = False
                 elif '{' in line and '"' in line:
-                    m = re.search('{ *("[^"]*"), *("[^"]*"), *&([^,]*), *{([^}]*)} *},', line)
+                    m = re.search(r'{ *("[^"]*"), *("[^"]*"), *&([^,]*), *{([^}]*)} *},', line)
                     assert m, 'No match to table expression: %s' % line
                     name = parse_string(m.group(2))
                     args_str = m.group(4).strip()
@@ -80,7 +80,7 @@ def process_mapping(fname):
                 if line.startswith('};'):
                     in_rpcs = False
                 elif '{' in line and '"' in line:
-                    m = re.search('{ *("[^"]*"), *([0-9]+) *, *("[^"]*") *},', line)
+                    m = re.search(r'{ *("[^"]*"), *([0-9]+) *, *("[^"]*") *},', line)
                     assert m, 'No match to table expression: %s' % line
                     name = parse_string(m.group(1))
                     idx = int(m.group(2))
diff --git a/test/lint/lint-format-strings.py b/test/lint/lint-format-strings.py
index 47ad896589..9f34d0f4dd 100755
--- a/test/lint/lint-format-strings.py
+++ b/test/lint/lint-format-strings.py
@@ -55,7 +55,7 @@ def normalize(s):
     assert type(s) is str
     s = s.replace("\n", " ")
     s = s.replace("\t", " ")
-    s = re.sub("/\*.*?\*/", " ", s)
+    s = re.sub(r"/\*.*?\*/", " ", s)
     s = re.sub(" {2,}", " ", s)
     return s.strip()