<p></p>
<blockquote>
<p dir="auto">I thought it could document the code well instead of using hard-coded number. But maybe I should add a comment instead and use the hard-coded number?</p>
</blockquote>
<p dir="auto">According to internet, clang and gcc can optimize <code>strlen</code> to a constant.  So I guess it would okay.  I'd recommend leaving the space and quote out, since it's possible different implementations of make might use different quotes, especially on different operating systems.</p>

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