use-regular-expressions-to-simplify-less_greater-and-not_equals.patch

[孙诗浩(思才)]

     we can use regular expressions (<>|!=) to cover "<>" and "!=". There is no
need to have two definitions less_greater and not_equals, because it will 
confuse developer.
So, we can use only not_equals to cover this operator set.

Please review my patch.

Thanks.

use-regular-expressions-to-simplify-less_greater-and-not_equals.patch
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