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bf294827ef
In 2017, GNU diff had been replaced by BSD licensed diff in our base, but some features of GNU diff had not been implemented, particularly, the ``group format'' family of options. Instead of checking for the ${OSVERSION} value, check if installed diff(1) implementation is GNU or BSD one based on the --version output. Because conditions are subject to immediate expansion, we cannot use ${DIFF} and ${GREP} variables; however, literal ``diff'' is actually correct in this particular case as user's preferred diff(1) does not necessarily point to ``/usr/bin/diff'' which ${DIFF} expands to. While here, amend the EDITOR option description so it clearly refers to the internal *text* editor. |
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