Fix most trivially-findable print statements.

There's one major and one minor category still unfixed:
doctests are the major category (and I hope to be able to augment the
refactoring tool to refactor bona fide doctests soon);
other code generating print statements in strings is the minor category.

(Oh, and I don't know if the compiler package works.)

Lib/webbrowser.py

@@ -626,21 +626,21 @@ def main():
     try:
         opts, args = getopt.getopt(sys.argv[1:], 'ntd')
     except getopt.error as msg:
-        print >>sys.stderr, msg
-        print >>sys.stderr, usage
+        print(msg, file=sys.stderr)
+        print(usage, file=sys.stderr)
         sys.exit(1)
     new_win = 0
     for o, a in opts:
         if o == '-n': new_win = 1
         elif o == '-t': new_win = 2
     if len(args) != 1:
-        print >>sys.stderr, usage
+        print(usage, file=sys.stderr)
         sys.exit(1)
 
     url = args[0]
     open(url, new_win)
 
-    print "\a"
+    print("\a")
 
 if __name__ == "__main__":
     main()