doc/git-config: explain --file instead of referring to GIT_CONFIG
The explanation for the --file option only refers to GIT_CONFIG. This redirection to an environment variable is confusing, but doubly so because the description of GIT_CONFIG is out of date. Let's describe --file from scratch, detailing both the reading and writing behavior as we do for other similar options like --system, etc. Signed-off-by: Jeff King <peff@peff.net> Reviewed-by: Taylor Blau <me@ttaylorr.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>maint
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@ -143,7 +143,13 @@ See also <<FILES>>.
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-f config-file::
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--file config-file::
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Use the given config file instead of the one specified by GIT_CONFIG.
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For writing options: write to the specified file rather than the
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repository `.git/config`.
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+
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For reading options: read only from the specified file rather than from all
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available files.
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+
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See also <<FILES>>.
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--blob blob::
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Similar to `--file` but use the given blob instead of a file. E.g.
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