Re: suggested feautre: "date --debug" - print date parsing diagnostics

[Assaf Gordon]

Hello Bernhard, Pádraig,

Thank you for the comments.

Updated patch attached which hopefully addresses all the mentioned issues:
1. corrected copyright year (s/2004-//).
2. skip test if timezone-by-city-name not supported.
3. remote whitespace indentation from git message
4. mention required gnulib commit in coreutil's commit message
5. mention '@opindex --debug' in docs (also added few @cindex)
6. removed trailing spaces from debug messages (and from test)
7. use fail=1 instead of framework_failure_ where appropriate

more comments and suggestions are welcomed.

- assaf

0001-coreutils-date-add-debug-option.2016-05-01.patch.xz
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0001-gnulib-parse-datetime-debug.2016-05-01.patch.xz
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