The raw string r'\' fails

[passage]

BPO	1984
Nosy	@birkenfeld

^{Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.}

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GitHub fields:

assignee = None
closed_at = <Date 2008-01-31.23:26:17.463>
created_at = <Date 2008-01-31.22:26:01.793>
labels = ['interpreter-core', 'type-bug']
title = "The raw string r'\\' fails"
updated_at = <Date 2008-01-31.23:26:17.456>
user = 'https://bugs.python.org/passage'

bugs.python.org fields:

activity = <Date 2008-01-31.23:26:17.456>
actor = 'georg.brandl'
assignee = 'none'
closed = True
closed_date = <Date 2008-01-31.23:26:17.463>
closer = 'georg.brandl'
components = ['Interpreter Core']
creation = <Date 2008-01-31.22:26:01.793>
creator = 'passage'
dependencies = []
files = []
hgrepos = []
issue_num = 1984
keywords = []
message_count = 2.0
messages = ['61936', '61940']
nosy_count = 2.0
nosy_names = ['georg.brandl', 'passage']
pr_nums = []
priority = 'normal'
resolution = 'wont fix'
stage = None
status = 'closed'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue1984'
versions = ['Python 2.5']

[passage]

Python's raw strings are supposed to prevent characters being
interpreted as special. However entering the raw string r'\' into an
interactive session will result in:

Traceback ( File "<interactive input>", line 1
r'\'
^
SyntaxError: EOL while scanning single-quoted string

Python seems to have escaped the close of the string, even though raw
strings are not supposed to ever escape characters.

[birkenfeld]

This is not easily fixable -- it has been discussed several times on
python-dev and won't change.