/in/foo.c:1:1: error: expected identifier or '(' before 'while'
    1 | while True:
      | ^~~~~
/in/foo.c:9:1: error: stray '\342' in program
    9 | ​
      | ^
/in/foo.c:9:2: error: stray '\200' in program
    9 | ​
      |  ^
/in/foo.c:9:3: error: stray '\213' in program
    9 | ​
      |   ^