We are currently solving the following issue within our repository. Here is the issue text:
--- BEGIN ISSUE ---
Bug in reader: can't terminate string literals containing \ at end of line.
Common Lisp had docstrings before Python existed. Hy should totally support this.

``` Python
>>> def foo():
    """I'm a docstring!"""
    return 42

>>> help(foo)
Help on function foo in module __main__:

foo()
    I'm a docstring!

>>> foo.__doc__
"I'm a docstring!"
```

Let's try it in Hy.

```
=> (defn foo ()
... """I'm a docstring"""
... 42)
=> (help foo)
Help on function foo:

foo()

=> foo.__doc__
''
```

?!
Where's my docstring?
(some time later...)
Let's try hy2py.

``` Python
def foo():
    ''
    "I'm a docstring!"
    ''
    return 42
```

I see what you did there, Hy. Yeah, there should probably be a warning about that somewhere. Triple  quotes don't work. Why does Python use them anyway? So we can include newlines mostly. Common Lisp strings do that already. Does Hy?

```
=> "one
... two"
'one\ntwo
```

Yup. Looks good.
Escapes also appear to work. But what if I actually wanted backslashes? Do raw strings work?

```
=> r"\foo"
'\\foo
```

Nice. Now **raw** triple quoted strings? This works in Python:

``` Python
>>> r"""\
foo"""
'\\\nfoo'
```

Let's use what we've learned and try it in Hy.

```
=> r"\
... foo"
... "
... ""
... """
... what?
... \
... \
... \\
... \\\
... \\\\
... \"
... \\"
... \\\"
... \\\\"
...   C-c C-c

KeyboardInterrupt
```

Something is broken...


--- END ISSUE ---

Below are some code segments, each from a relevant file. One or more of these files may contain bugs.
--- BEGIN FILES ---
Path: `hy/lex/lexer.py`
Content:
```
1 # Copyright (c) 2013 Nicolas Dandrimont <nicolas.dandrimont@crans.org>
2 #
3 # Permission is hereby granted, free of charge, to any person obtaining a
4 # copy of this software and associated documentation files (the "Software"),
5 # to deal in the Software without restriction, including without limitation
6 # the rights to use, copy, modify, merge, publish, distribute, sublicense,
7 # and/or sell copies of the Software, and to permit persons to whom the
8 # Software is furnished to do so, subject to the following conditions:
9 #
10 # The above copyright notice and this permission notice shall be included in
11 # all copies or substantial portions of the Software.
12 #
13 # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
14 # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
15 # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
16 # THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
17 # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
18 # FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
19 # DEALINGS IN THE SOFTWARE.
20 
21 from rply import LexerGenerator
22 
23 
24 lg = LexerGenerator()
25 
26 
27 # A regexp for something that should end a quoting/unquoting operator
28 # i.e. a space or a closing brace/paren/curly
29 end_quote = r'(?![\s\)\]\}])'
30 
31 
32 lg.add('LPAREN', r'\(')
33 lg.add('RPAREN', r'\)')
34 lg.add('LBRACKET', r'\[')
35 lg.add('RBRACKET', r'\]')
36 lg.add('LCURLY', r'\{')
37 lg.add('RCURLY', r'\}')
38 lg.add('HLCURLY', r'#\{')
39 lg.add('QUOTE', r'\'%s' % end_quote)
40 lg.add('QUASIQUOTE', r'`%s' % end_quote)
41 lg.add('UNQUOTESPLICE', r'~@%s' % end_quote)
42 lg.add('UNQUOTE', r'~%s' % end_quote)
43 lg.add('HASHBANG', r'#!.*[^\r\n]')
44 lg.add('HASHREADER', r'#[^{]')
45 
46 # A regexp which matches incomplete strings, used to support
47 # multi-line strings in the interpreter
48 partial_string = r'''(?x)
49     (?:u|r|ur|ru)? # prefix
50     "  # start string
51     (?:
52        | [^"\\]             # non-quote or backslash
53        | \\.                # or escaped single character
54        | \\x[0-9a-fA-F]{2}  # or escaped raw character
55        | \\u[0-9a-fA-F]{4}  # or unicode escape
56        | \\U[0-9a-fA-F]{8}  # or long unicode escape
57     )* # one or more times
58 '''
59 
60 lg.add('STRING', r'%s"' % partial_string)
61 lg.add('PARTIAL_STRING', partial_string)
62 
63 lg.add('IDENTIFIER', r'[^()\[\]{}\'"\s;]+')
64 
65 
66 lg.ignore(r';.*(?=\r|\n|$)')
67 lg.ignore(r'\s+')
68 
69 
70 lexer = lg.build()
71
```
--- 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/hy/lex/lexer.py b/hy/lex/lexer.py
--- a/hy/lex/lexer.py
+++ b/hy/lex/lexer.py
@@ -50,7 +50,7 @@
     "  # start string
     (?:
        | [^"\\]             # non-quote or backslash
-       | \\.                # or escaped single character
+       | \\(.|\n)           # or escaped single character or newline
        | \\x[0-9a-fA-F]{2}  # or escaped raw character
        | \\u[0-9a-fA-F]{4}  # or unicode escape
        | \\U[0-9a-fA-F]{8}  # or long unicode escape

{"golden_diff": "diff --git a/hy/lex/lexer.py b/hy/lex/lexer.py\n--- a/hy/lex/lexer.py\n+++ b/hy/lex/lexer.py\n@@ -50,7 +50,7 @@\n     \"  # start string\n     (?:\n        | [^\"\\\\]             # non-quote or backslash\n-       | \\\\.                # or escaped single character\n+       | \\\\(.|\\n)           # or escaped single character or newline\n        | \\\\x[0-9a-fA-F]{2}  # or escaped raw character\n        | \\\\u[0-9a-fA-F]{4}  # or unicode escape\n        | \\\\U[0-9a-fA-F]{8}  # or long unicode escape\n", "issue": "Bug in reader: can't terminate string literals containing \\ at end of line.\nCommon Lisp had docstrings before Python existed. Hy should totally support this.\n\n``` Python\n>>> def foo():\n    \"\"\"I'm a docstring!\"\"\"\n    return 42\n\n>>> help(foo)\nHelp on function foo in module __main__:\n\nfoo()\n    I'm a docstring!\n\n>>> foo.__doc__\n\"I'm a docstring!\"\n```\n\nLet's try it in Hy.\n\n```\n=> (defn foo ()\n... \"\"\"I'm a docstring\"\"\"\n... 42)\n=> (help foo)\nHelp on function foo:\n\nfoo()\n\n=> foo.__doc__\n''\n```\n\n?!\nWhere's my docstring?\n(some time later...)\nLet's try hy2py.\n\n``` Python\ndef foo():\n    ''\n    \"I'm a docstring!\"\n    ''\n    return 42\n```\n\nI see what you did there, Hy. Yeah, there should probably be a warning about that somewhere. Triple  quotes don't work. Why does Python use them anyway? So we can include newlines mostly. Common Lisp strings do that already. Does Hy?\n\n```\n=> \"one\n... two\"\n'one\\ntwo\n```\n\nYup. Looks good.\nEscapes also appear to work. But what if I actually wanted backslashes? Do raw strings work?\n\n```\n=> r\"\\foo\"\n'\\\\foo\n```\n\nNice. Now **raw** triple quoted strings? This works in Python:\n\n``` Python\n>>> r\"\"\"\\\nfoo\"\"\"\n'\\\\\\nfoo'\n```\n\nLet's use what we've learned and try it in Hy.\n\n```\n=> r\"\\\n... foo\"\n... \"\n... \"\"\n... \"\"\"\n... what?\n... \\\n... \\\n... \\\\\n... \\\\\\\n... \\\\\\\\\n... \\\"\n... \\\\\"\n... \\\\\\\"\n... \\\\\\\\\"\n...   C-c C-c\n\nKeyboardInterrupt\n```\n\nSomething is broken...\n\n", "before_files": [{"content": "# Copyright (c) 2013 Nicolas Dandrimont <nicolas.dandrimont@crans.org>\n#\n# Permission is hereby granted, free of charge, to any person obtaining a\n# copy of this software and associated documentation files (the \"Software\"),\n# to deal in the Software without restriction, including without limitation\n# the rights to use, copy, modify, merge, publish, distribute, sublicense,\n# and/or sell copies of the Software, and to permit persons to whom the\n# Software is furnished to do so, subject to the following conditions:\n#\n# The above copyright notice and this permission notice shall be included in\n# all copies or substantial portions of the Software.\n#\n# THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL\n# THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER\n# DEALINGS IN THE SOFTWARE.\n\nfrom rply import LexerGenerator\n\n\nlg = LexerGenerator()\n\n\n# A regexp for something that should end a quoting/unquoting operator\n# i.e. a space or a closing brace/paren/curly\nend_quote = r'(?![\\s\\)\\]\\}])'\n\n\nlg.add('LPAREN', r'\\(')\nlg.add('RPAREN', r'\\)')\nlg.add('LBRACKET', r'\\[')\nlg.add('RBRACKET', r'\\]')\nlg.add('LCURLY', r'\\{')\nlg.add('RCURLY', r'\\}')\nlg.add('HLCURLY', r'#\\{')\nlg.add('QUOTE', r'\\'%s' % end_quote)\nlg.add('QUASIQUOTE', r'`%s' % end_quote)\nlg.add('UNQUOTESPLICE', r'~@%s' % end_quote)\nlg.add('UNQUOTE', r'~%s' % end_quote)\nlg.add('HASHBANG', r'#!.*[^\\r\\n]')\nlg.add('HASHREADER', r'#[^{]')\n\n# A regexp which matches incomplete strings, used to support\n# multi-line strings in the interpreter\npartial_string = r'''(?x)\n    (?:u|r|ur|ru)? # prefix\n    \"  # start string\n    (?:\n       | [^\"\\\\]             # non-quote or backslash\n       | \\\\.                # or escaped single character\n       | \\\\x[0-9a-fA-F]{2}  # or escaped raw character\n       | \\\\u[0-9a-fA-F]{4}  # or unicode escape\n       | \\\\U[0-9a-fA-F]{8}  # or long unicode escape\n    )* # one or more times\n'''\n\nlg.add('STRING', r'%s\"' % partial_string)\nlg.add('PARTIAL_STRING', partial_string)\n\nlg.add('IDENTIFIER', r'[^()\\[\\]{}\\'\"\\s;]+')\n\n\nlg.ignore(r';.*(?=\\r|\\n|$)')\nlg.ignore(r'\\s+')\n\n\nlexer = lg.build()\n", "path": "hy/lex/lexer.py"}], "after_files": [{"content": "# Copyright (c) 2013 Nicolas Dandrimont <nicolas.dandrimont@crans.org>\n#\n# Permission is hereby granted, free of charge, to any person obtaining a\n# copy of this software and associated documentation files (the \"Software\"),\n# to deal in the Software without restriction, including without limitation\n# the rights to use, copy, modify, merge, publish, distribute, sublicense,\n# and/or sell copies of the Software, and to permit persons to whom the\n# Software is furnished to do so, subject to the following conditions:\n#\n# The above copyright notice and this permission notice shall be included in\n# all copies or substantial portions of the Software.\n#\n# THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL\n# THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER\n# DEALINGS IN THE SOFTWARE.\n\nfrom rply import LexerGenerator\n\n\nlg = LexerGenerator()\n\n\n# A regexp for something that should end a quoting/unquoting operator\n# i.e. a space or a closing brace/paren/curly\nend_quote = r'(?![\\s\\)\\]\\}])'\n\n\nlg.add('LPAREN', r'\\(')\nlg.add('RPAREN', r'\\)')\nlg.add('LBRACKET', r'\\[')\nlg.add('RBRACKET', r'\\]')\nlg.add('LCURLY', r'\\{')\nlg.add('RCURLY', r'\\}')\nlg.add('HLCURLY', r'#\\{')\nlg.add('QUOTE', r'\\'%s' % end_quote)\nlg.add('QUASIQUOTE', r'`%s' % end_quote)\nlg.add('UNQUOTESPLICE', r'~@%s' % end_quote)\nlg.add('UNQUOTE', r'~%s' % end_quote)\nlg.add('HASHBANG', r'#!.*[^\\r\\n]')\nlg.add('HASHREADER', r'#[^{]')\n\n# A regexp which matches incomplete strings, used to support\n# multi-line strings in the interpreter\npartial_string = r'''(?x)\n    (?:u|r|ur|ru)? # prefix\n    \"  # start string\n    (?:\n       | [^\"\\\\]             # non-quote or backslash\n       | \\\\(.|\\n)           # or escaped single character or newline\n       | \\\\x[0-9a-fA-F]{2}  # or escaped raw character\n       | \\\\u[0-9a-fA-F]{4}  # or unicode escape\n       | \\\\U[0-9a-fA-F]{8}  # or long unicode escape\n    )* # one or more times\n'''\n\nlg.add('STRING', r'%s\"' % partial_string)\nlg.add('PARTIAL_STRING', partial_string)\n\nlg.add('IDENTIFIER', r'[^()\\[\\]{}\\'\"\\s;]+')\n\n\nlg.ignore(r';.*(?=\\r|\\n|$)')\nlg.ignore(r'\\s+')\n\n\nlexer = lg.build()\n", "path": "hy/lex/lexer.py"}]}