R: string literals

> 'The text is "Hello world"'
[1] "The text is \"Hello world\""

> 'c:\users\rene'
Error: '\u' used without hex digits in character string starting "'c:\u"

> 'c:\\users\\rene'
[1] "c:\\users\\rene"

> r'{c:\users\rene}'
[1] "c:\\users\\rene"

> r'(c:\users\rene)'
[1] "c:\\users\\rene"

… etc. …