Fix automatic indentation in case of certain character literals
Fix automatic indentation in case of certain character literals

Currently vlime's automatic indentation would break if a `#\(` is found
anywhere on a buffer.

Expected behavior:

    (defun open-parenthesis-p (ch)
      (char= ch #\())
    _ ; <-- cursor position

Actual behavior:

    (defun open-parenthesis-p (ch)
      (char= ch #\())
      _ ; <-- cursor position

The fix is to change the call to `searchpairpos()` inside
`vlime#ui#ParseOuterOperators()` to skip over specific syntax types
(e.g. special, and symbol)

l04m33/vlime