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Here are some
reasons for refactoring.
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In this case the
design that is being improved is often very detailed design that is not
necessarily part of any design document.
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Simplifications
are often made to things like spaghetti code.
Sometimes they have to do with realizations made after the first
coding pass.
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The more clear
and concise the code, the easier errors can be identified.
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Refactoring
avoids the quick fix dilemma that results in patchwork programs.
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