Cleanup find_non_ascii.py script

util/find_non_ascii.py

@@ -1,15 +1,18 @@
 #!/usr/bin/python
 #
-#  $ for i in *.js; do python findnonascii.py $i; done
-
+#  Example:
+#
+#    $ for i in ecmascript-testcases/*.js; do python util/find_non_ascii.py $i; done
+#
 
 import os, sys
 
-f = open(sys.argv[1], 'rb')
-data = f.read()
-f.close()
+def main():
+	f = open(sys.argv[1], 'rb')
+	data = f.read()
+	f.close()
 
-for linenum, linedata in enumerate(data.split('\n')):
+	for linenum, linedata in enumerate(data.split('\n')):
 		non_ascii = False
 		for i in xrange(len(linedata)):
 			x = ord(linedata[i])
@@ -17,3 +20,6 @@ for linenum, linedata in enumerate(data.split('\n')):
 				print '%s: non-ascii data on line %d, char index %d, value %d (0x%02x)' % \
 					(sys.argv[1], linenum + 1, i + 1, x, x)
 				non_ascii = True
+
+if __name__ == '__main__':
+	main()