Fix 9068 newlines emcc error (emscripten-core#9088)

* Fix emscripten-core#9068: get rid of malformed newlines in emcc errors on Windows

This fixes a patch applied to acorn.js for quoting error-causing text
in parse errors (acornjs/acorn#793).
Previously it splitted binary data on \n to get lines, which was
inconsistent with the rest of the parser and caused excess \r in
the error message on Windows. Now it uses the same regex as the rest
of acorn.js (e.g. getLineInfo used by error reporting).

* Fix emscripten-core#9057 by fixing by emscripten-core#9068

tests/test_other.py

@@ -8589,7 +8589,6 @@ def test_extern_weak(self):
     if not self.is_wasm_backend(): # TODO: wasm backend main module
       self.do_other_test(os.path.join('other', 'extern_weak'), emcc_args=['-s', 'MAIN_MODULE=1', '-DLINKABLE'])
 
-  @no_windows('https://github.com/emscripten-core/emscripten/issues/9057')
   def test_js_optimizer_parse_error(self):
     # check we show a proper understandable error for JS parse problems
     create_test_file('src.cpp', r'''
@@ -8608,7 +8607,7 @@ def test_js_optimizer_parse_error(self):
 ''', '''
 var ASM_CONSTS = [function() {var x = !<->5.;}];
                                        ^
-'''), stderr.replace('\r', ''))
+'''), stderr)
 
   def test_EM_ASM_ES6(self):
     # check we show a proper understandable error for JS parse problems