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tr portability fixes
Specifying character ranges in tr differs between System V and POSIX. In System V, brackets are required (e.g., '[A-Z]'), whereas in POSIX they are not. We can mostly get around this by just using the bracket form for both sets, as in: tr '[A-Z] '[a-z]' in which case POSIX interpets this as "'[' becomes '['", which is OK. However, this doesn't work with multiple sequences, like: # rot13 tr '[A-Z][a-z]' '[N-Z][A-M][n-z][a-m]' where the POSIX version does not behave the same as the System V version. In this case, we must simply enumerate the sequence. This patch fixes problematic uses of tr in git scripts and test scripts in one of three ways: - if a single sequence, make sure it uses brackets - if multiple sequences, enumerate - if extra brackets (e.g., tr '[A]' 'a'), eliminate brackets Signed-off-by: Jeff King <email@example.com> Signed-off-by: Junio C Hamano <firstname.lastname@example.org>
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