Philip Prindeville e495a05069 env: only use color diffs on terminals ...

When sending script/env diff's output to a file or pipeline, you
don't want escape characters for ANSI color sequences fouling the
byte stream.

Signed-off-by: Philip Prindeville <philipp@redfish-solutions.com>

2018-05-05 09:44:43 +02:00

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