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ash: expand comment
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@ -13878,7 +13878,8 @@ int ash_main(int argc UNUSED_PARAM, char **argv)
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if (minusc) {
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/* evalstring pushes parsefile stack.
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* Ensure we don't falsely claim that 0 (stdin)
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* is one of stacked source fds */
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* is one of stacked source fds.
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* Testcase: ash -c 'exec 1>&0' must not complain. */
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if (!sflag)
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g_parsefile->fd = -1;
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evalstring(minusc, 0);
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