Syntax warnings

/bin/busdisplay:74: SyntaxWarning: invalid escape sequence '\-'
  sp+' _|--/~\------/~\-+  |__________________| |__________________| |__________________|'+sp,
/bin/busdisplay:75: SyntaxWarning: invalid escape sequence '\_'
  sp+'//// \_/      \_/       (O)        (O)       (O)        (O)     (O)        (O)sp   '+sp
/bin/busdisplay:87: SyntaxWarning: invalid escape sequence '\s'
  sp = re.split('\s+|(?=\()|(?<=\))', text)
/bin/busdisplay:296: SyntaxWarning: invalid escape sequence '\_'
  self.block.set_rows([(None, 'K1', 'Zyge', '¯\_(ü)_/¯')])