Concatenate Multi-Line Java String Literals

cat_literals.py

import fileinput
x = ""
for line in fileinput.input():
  x += line

s = ""
i = 1
while i < len(x):
  if x[i] == '"':
    i += 1
    while i < len(x) and x[i] != '"':
      i = i + 1
  else:
    s += x[i]
  i += 1

bill-mbp:~ bill$ cat literal.txt
"SELECT customer as id "
              + "FROM customers "
              + "ON id = order.id "
bill-mbp:~ bill$ python cat_literals.py < literal.txt
SELECT customer as id FROM customers ON id = order.id