We are currently solving the following issue within our repository. Here is the issue text:
--- BEGIN ISSUE ---
Review links to OWASP wiki
### Describe the bug

We have references to other OWASP projects in our files:

```
rules/REQUEST-933-APPLICATION-ATTACK-PHP.conf
28:# https://www.owasp.org/index.php/PHP_Top_5#P1:_Remote_Code_Executionh
366:# https://www.owasp.org/index.php/PHP_Object_Injection

rules/REQUEST-921-PROTOCOL-ATTACK.conf
194:# Reference: https://www.owasp.org/index.php/Testing_for_HTTP_Splitting/Smuggling_(OTG-INPVAL-016)

rules/REQUEST-920-PROTOCOL-ENFORCEMENT.conf
97:# https://www.owasp.org/index.php/ModSecurity_CRS_RuleID-96000

CHANGES.md
977:  https://www.owasp.org/index.php/AppSensor_DetectionPoints

rules/REQUEST-932-APPLICATION-ATTACK-RCE.conf
690:# https://www.owasp.org/index.php/Unrestricted_File_Upload

rules/scanners-user-agents.data
58:# https://www.owasp.org/index.php/Category:OWASP_DirBuster_Project
```
We need to double check they are still valid and update if not.

--- END ISSUE ---

Below are some code segments, each from a relevant file. One or more of these files may contain bugs.
--- BEGIN FILES ---
Path: `util/regexp-tricks/negative-lookahead.py`
Content:
```
1 import argparse
2 
3 # WARNING: This script is EXPERIMENTAL. Use with caution.
4 #
5 # Known issues:
6 #   * At the moment, it will probably not work with more than two strings.
7 #
8 # Known limitations:
9 #   * Any substrings of a target string will also NOT be matched. This is probably due to a limitation in this technique,
10 #   make sure that subtrings of the negative lookahead are not harmful in any way.
11 
12 parser = argparse.ArgumentParser(description="This script takes a list of strings and converts them into \
13     a regex that acts like a negative lookahead")
14 parser.add_argument("strings", type=str, nargs='+',
15     help="the strings to convert into a negative lookahead")
16 parser.add_argument("--prefix", type=str, default="",
17     help="sets a prefix for the resulting regex")
18 parser.add_argument("--suffix", type=str, default="",
19     help="sets a suffix for the resulting regex")
20 
21 args = parser.parse_args()
22 
23 # Return the longest prefix of all list elements. Shamelessly copied from:
24 # https://stackoverflow.com/questions/6718196/determine-prefix-from-a-set-of-similar-strings
25 def commonprefix(m):
26     "Given a list of pathnames, returns the longest common leading component"
27     if not m: return ''
28     s1 = min(m)
29     s2 = max(m)
30     for i, c in enumerate(s1):
31         if c != s2[i]:
32             return s1[:i]
33     return s1
34 
35 # flatten returns a string with concatenated dictionary keys
36 def flatten(dict):
37     s = ""
38 
39     for key in dict.keys():
40         s += key
41 
42     return s
43 
44 # set returns a character set containing the unique characters across all strings for the given index
45 def set(strings, index, flags):
46     dict = {}
47 
48     for s in strings:
49         # Continue so we don't panic
50         if index > len(s) -1:
51             continue
52         
53         dict[s[index]] = ''
54     
55     return "[" + flags + flatten(dict) + "]"
56 
57 # prepare converts a string for negative lookaheads emulation
58 def prepare(s, offset):
59     r = ""
60 
61     if len(s) == 0:
62         return r
63 
64     for i in range(offset, len(s)):
65         for j in range(0, i + 1):
66             if j == i:
67                 r += "[^" + s[j] + "]"
68             else:
69                 r += s[j]
70 
71         if i != len(s) - 1:
72             r += "|"
73 
74     return r
75 
76 # run runs the 
77 def run():
78     strings = args.strings
79 
80     r = ""
81     r += set(strings, 0, "^")
82 
83     c = ""
84     d = {}
85 
86     # Only find common string if we have more than one
87     if len(strings) > 1:
88         c = commonprefix(strings)
89         
90         # Collect all characters after the common substring from every string
91         for s in strings:
92             if len(s) > len(c) and s.startswith(c):
93                 d[s[len(c)]] = ''
94 
95     # Add the common string to the regex to prevent accidental matching
96     if len(c) > 0:
97         if len(c) > 1:
98             r += "|" +  "(?:" + prepare(c, 1) + ")"
99 
100         r +=  "|" + "(?:" + c + "[^" + flatten(d) + "]" + ")"
101 
102     for s in strings:
103         g = ""
104 
105         # When the common string is > 0, offset with len(c) + 1 because we handled this earlier
106         if len(c) > 0:
107             g = prepare(s, len(c) + 1)
108         else:
109             g = prepare(s, 1)
110         
111         # Add OR boolean if necessary
112         if len(g) > 0:
113             r += "|"
114 
115         r += g
116 
117     print(args.prefix + "(?:" + r + ")" + args.suffix)
118 
119 # Only run if script is called directly
120 if __name__ == "__main__":
121     run()
122
```
--- END FILES ---

Please first localize the bug based on the issue statement, and then generate a patch according to the `git diff` format fenced by three backticks.

Here is an example:

```diff
diff --git a/examples/server_async.py b/examples/server_async.py
--- a/examples/server_async.py
+++ b/examples/server_async.py
@@ -313,4 +313,4 @@
 
 
 if __name__ == "__main__":
-    asyncio.run(run_async_server("."), debug=True)
+    asyncio.run(run_async_server(), debug=True)
diff --git a/examples/server_sync.py b/examples/server_sync.py
--- a/examples/server_sync.py
+++ b/examples/server_sync.py
@@ -313,5 +313,5 @@
 
 
 if __name__ == "__main__":
-    server = run_sync_server(".")
+    server = run_sync_server()
     server.shutdown()

```

diff --git a/util/regexp-tricks/negative-lookahead.py b/util/regexp-tricks/negative-lookahead.py
--- a/util/regexp-tricks/negative-lookahead.py
+++ b/util/regexp-tricks/negative-lookahead.py
@@ -21,7 +21,7 @@
 args = parser.parse_args()
 
 # Return the longest prefix of all list elements. Shamelessly copied from:
-# https://stackoverflow.com/questions/6718196/determine-prefix-from-a-set-of-similar-strings
+# https://stackoverflow.com/questions/6718196/determine-the-common-prefix-of-multiple-strings
 def commonprefix(m):
     "Given a list of pathnames, returns the longest common leading component"
     if not m: return ''

{"golden_diff": "diff --git a/util/regexp-tricks/negative-lookahead.py b/util/regexp-tricks/negative-lookahead.py\n--- a/util/regexp-tricks/negative-lookahead.py\n+++ b/util/regexp-tricks/negative-lookahead.py\n@@ -21,7 +21,7 @@\n args = parser.parse_args()\n \n # Return the longest prefix of all list elements. Shamelessly copied from:\n-# https://stackoverflow.com/questions/6718196/determine-prefix-from-a-set-of-similar-strings\n+# https://stackoverflow.com/questions/6718196/determine-the-common-prefix-of-multiple-strings\n def commonprefix(m):\n     \"Given a list of pathnames, returns the longest common leading component\"\n     if not m: return ''\n", "issue": "Review links to OWASP wiki\n### Describe the bug\r\n\r\nWe have references to other OWASP projects in our files:\r\n\r\n```\r\nrules/REQUEST-933-APPLICATION-ATTACK-PHP.conf\r\n28:# https://www.owasp.org/index.php/PHP_Top_5#P1:_Remote_Code_Executionh\r\n366:# https://www.owasp.org/index.php/PHP_Object_Injection\r\n\r\nrules/REQUEST-921-PROTOCOL-ATTACK.conf\r\n194:# Reference: https://www.owasp.org/index.php/Testing_for_HTTP_Splitting/Smuggling_(OTG-INPVAL-016)\r\n\r\nrules/REQUEST-920-PROTOCOL-ENFORCEMENT.conf\r\n97:# https://www.owasp.org/index.php/ModSecurity_CRS_RuleID-96000\r\n\r\nCHANGES.md\r\n977:  https://www.owasp.org/index.php/AppSensor_DetectionPoints\r\n\r\nrules/REQUEST-932-APPLICATION-ATTACK-RCE.conf\r\n690:# https://www.owasp.org/index.php/Unrestricted_File_Upload\r\n\r\nrules/scanners-user-agents.data\r\n58:# https://www.owasp.org/index.php/Category:OWASP_DirBuster_Project\r\n```\r\nWe need to double check they are still valid and update if not.\n", "before_files": [{"content": "import argparse\n\n# WARNING: This script is EXPERIMENTAL. Use with caution.\n#\n# Known issues:\n#   * At the moment, it will probably not work with more than two strings.\n#\n# Known limitations:\n#   * Any substrings of a target string will also NOT be matched. This is probably due to a limitation in this technique,\n#   make sure that subtrings of the negative lookahead are not harmful in any way.\n\nparser = argparse.ArgumentParser(description=\"This script takes a list of strings and converts them into \\\n    a regex that acts like a negative lookahead\")\nparser.add_argument(\"strings\", type=str, nargs='+',\n    help=\"the strings to convert into a negative lookahead\")\nparser.add_argument(\"--prefix\", type=str, default=\"\",\n    help=\"sets a prefix for the resulting regex\")\nparser.add_argument(\"--suffix\", type=str, default=\"\",\n    help=\"sets a suffix for the resulting regex\")\n\nargs = parser.parse_args()\n\n# Return the longest prefix of all list elements. Shamelessly copied from:\n# https://stackoverflow.com/questions/6718196/determine-prefix-from-a-set-of-similar-strings\ndef commonprefix(m):\n    \"Given a list of pathnames, returns the longest common leading component\"\n    if not m: return ''\n    s1 = min(m)\n    s2 = max(m)\n    for i, c in enumerate(s1):\n        if c != s2[i]:\n            return s1[:i]\n    return s1\n\n# flatten returns a string with concatenated dictionary keys\ndef flatten(dict):\n    s = \"\"\n\n    for key in dict.keys():\n        s += key\n\n    return s\n\n# set returns a character set containing the unique characters across all strings for the given index\ndef set(strings, index, flags):\n    dict = {}\n\n    for s in strings:\n        # Continue so we don't panic\n        if index > len(s) -1:\n            continue\n        \n        dict[s[index]] = ''\n    \n    return \"[\" + flags + flatten(dict) + \"]\"\n\n# prepare converts a string for negative lookaheads emulation\ndef prepare(s, offset):\n    r = \"\"\n\n    if len(s) == 0:\n        return r\n\n    for i in range(offset, len(s)):\n        for j in range(0, i + 1):\n            if j == i:\n                r += \"[^\" + s[j] + \"]\"\n            else:\n                r += s[j]\n\n        if i != len(s) - 1:\n            r += \"|\"\n\n    return r\n\n# run runs the \ndef run():\n    strings = args.strings\n\n    r = \"\"\n    r += set(strings, 0, \"^\")\n\n    c = \"\"\n    d = {}\n\n    # Only find common string if we have more than one\n    if len(strings) > 1:\n        c = commonprefix(strings)\n        \n        # Collect all characters after the common substring from every string\n        for s in strings:\n            if len(s) > len(c) and s.startswith(c):\n                d[s[len(c)]] = ''\n\n    # Add the common string to the regex to prevent accidental matching\n    if len(c) > 0:\n        if len(c) > 1:\n            r += \"|\" +  \"(?:\" + prepare(c, 1) + \")\"\n\n        r +=  \"|\" + \"(?:\" + c + \"[^\" + flatten(d) + \"]\" + \")\"\n\n    for s in strings:\n        g = \"\"\n\n        # When the common string is > 0, offset with len(c) + 1 because we handled this earlier\n        if len(c) > 0:\n            g = prepare(s, len(c) + 1)\n        else:\n            g = prepare(s, 1)\n        \n        # Add OR boolean if necessary\n        if len(g) > 0:\n            r += \"|\"\n\n        r += g\n\n    print(args.prefix + \"(?:\" + r + \")\" + args.suffix)\n\n# Only run if script is called directly\nif __name__ == \"__main__\":\n    run()\n", "path": "util/regexp-tricks/negative-lookahead.py"}], "after_files": [{"content": "import argparse\n\n# WARNING: This script is EXPERIMENTAL. Use with caution.\n#\n# Known issues:\n#   * At the moment, it will probably not work with more than two strings.\n#\n# Known limitations:\n#   * Any substrings of a target string will also NOT be matched. This is probably due to a limitation in this technique,\n#   make sure that subtrings of the negative lookahead are not harmful in any way.\n\nparser = argparse.ArgumentParser(description=\"This script takes a list of strings and converts them into \\\n    a regex that acts like a negative lookahead\")\nparser.add_argument(\"strings\", type=str, nargs='+',\n    help=\"the strings to convert into a negative lookahead\")\nparser.add_argument(\"--prefix\", type=str, default=\"\",\n    help=\"sets a prefix for the resulting regex\")\nparser.add_argument(\"--suffix\", type=str, default=\"\",\n    help=\"sets a suffix for the resulting regex\")\n\nargs = parser.parse_args()\n\n# Return the longest prefix of all list elements. Shamelessly copied from:\n# https://stackoverflow.com/questions/6718196/determine-the-common-prefix-of-multiple-strings\ndef commonprefix(m):\n    \"Given a list of pathnames, returns the longest common leading component\"\n    if not m: return ''\n    s1 = min(m)\n    s2 = max(m)\n    for i, c in enumerate(s1):\n        if c != s2[i]:\n            return s1[:i]\n    return s1\n\n# flatten returns a string with concatenated dictionary keys\ndef flatten(dict):\n    s = \"\"\n\n    for key in dict.keys():\n        s += key\n\n    return s\n\n# set returns a character set containing the unique characters across all strings for the given index\ndef set(strings, index, flags):\n    dict = {}\n\n    for s in strings:\n        # Continue so we don't panic\n        if index > len(s) -1:\n            continue\n        \n        dict[s[index]] = ''\n    \n    return \"[\" + flags + flatten(dict) + \"]\"\n\n# prepare converts a string for negative lookaheads emulation\ndef prepare(s, offset):\n    r = \"\"\n\n    if len(s) == 0:\n        return r\n\n    for i in range(offset, len(s)):\n        for j in range(0, i + 1):\n            if j == i:\n                r += \"[^\" + s[j] + \"]\"\n            else:\n                r += s[j]\n\n        if i != len(s) - 1:\n            r += \"|\"\n\n    return r\n\n# run runs the \ndef run():\n    strings = args.strings\n\n    r = \"\"\n    r += set(strings, 0, \"^\")\n\n    c = \"\"\n    d = {}\n\n    # Only find common string if we have more than one\n    if len(strings) > 1:\n        c = commonprefix(strings)\n        \n        # Collect all characters after the common substring from every string\n        for s in strings:\n            if len(s) > len(c) and s.startswith(c):\n                d[s[len(c)]] = ''\n\n    # Add the common string to the regex to prevent accidental matching\n    if len(c) > 0:\n        if len(c) > 1:\n            r += \"|\" +  \"(?:\" + prepare(c, 1) + \")\"\n\n        r +=  \"|\" + \"(?:\" + c + \"[^\" + flatten(d) + \"]\" + \")\"\n\n    for s in strings:\n        g = \"\"\n\n        # When the common string is > 0, offset with len(c) + 1 because we handled this earlier\n        if len(c) > 0:\n            g = prepare(s, len(c) + 1)\n        else:\n            g = prepare(s, 1)\n        \n        # Add OR boolean if necessary\n        if len(g) > 0:\n            r += \"|\"\n\n        r += g\n\n    print(args.prefix + \"(?:\" + r + \")\" + args.suffix)\n\n# Only run if script is called directly\nif __name__ == \"__main__\":\n    run()\n", "path": "util/regexp-tricks/negative-lookahead.py"}]}