CALLBACK is a function called with the selected result if the user
successfully completes the input.
-Example: \(company-begin-with '\(\"foo\" \"foobar\" \"foobarbaz\"\)\)"
+Example: \(company-begin-with \\='\(\"foo\" \"foobar\" \"foobarbaz\"\)\)"
(let ((begin-marker (copy-marker (point) t)))
(company-begin-backend
(lambda (command &optional arg &rest ignored)