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test-lib-functions: make packetize() more efficient
The packetize() function takes its input on stdin, and requires 4 separate sub-processes to format a simple string. We can do much better by getting the length via the shell's "${#packet}" construct. The one caveat is that the shell can't put a NUL into a variable, so we'll have to continue to provide the stdin form for a few calls. There are a few other cleanups here in the touched code: - the stdin form of packetize() had an extra stray "%s" when printing the packet - the converted calls in t5562 can be made simpler by redirecting output as a block, rather than repeated appending Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
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