STRING_ESCAPE_CHARS should contain 'r'

[immanuelAtTQ]

see https://yara.readthedocs.io/en/stable/writingrules.html#text-strings

'r' is missing from STRING_ESCAPE_CHARS

[immanuelAtTQ]

I was able to fix this in my implementation by doing the following:

    # Ensure '\r' is supported: https://yara.readthedocs.io/en/stable/writingrules.html#text-strings
    parser.STRING_ESCAPE_CHARS.add('r')  # HACK adds to predefined {'"', '\\', 't', 'n', 'x'}
    parsed_rules = `parser.parse_string(value)```

[Derekt2]

Also saw this issue, and confirmed your workaround worked!

[neiltyagi]

Yes due to this issue plyara throws error when parsing a rule where string part contains \r.

Kindly fix it