Always read line-by-line with mode rU

bin/combine-examples.py

@@ -8,7 +8,7 @@ def main(argv):
     examples = {}
     requires = set()
     for filename in argv[1:]:
-        lines = open(filename).readlines()
+        lines = open(filename, 'rU').readlines()
         if len(lines) > 0 and lines[0].startswith('// NOCOMPILE'):
             continue
         requires.update(line for line in lines if line.startswith('goog.require'))

bin/generate-exports.py

@@ -113,7 +113,7 @@ def main(argv):
     for arg in args:
         in_comment = False
         object_literal = None
-        for line in open(arg):
+        for line in open(arg, 'rU'):
             line = line.strip()
             if not line:
                 continue

bin/pyglslunit.py

@@ -52,7 +52,7 @@ def main(argv):
     common, vertex, fragment = [], [], []
     attributes, uniforms, varyings = {}, {}, {}
     block = None
-    for line in open(options.input):
+    for line in open(options.input, 'rU'):
         if line.startswith('//!'):
             m = re.match(r'//!\s+NAMESPACE=(\S+)\s*\Z', line)
             if m: