* src/mktemp.c: Update copyright to use newer form.
Make first copyright lines consistent. Some did not end in ", Inc.".
Due to that missing ", Inc" at end of line, emacs' copyright-updating
code missed some opportunities. This corrects most of those, and
adds some mistakenly omitted years.
* src/chown-core.c: Adjust.
* src/chown-core.h: Likewise.
* src/copy.c: Likewise.
* src/copy.h: Likewise.
* src/cp-hash.c: Likewise.
* src/cp.c: Likewise.
* src/group-list.h: Likewise.
* src/mktemp.c: Likewise.
* src/stat.c: Likewise.
* tests/chmod/equal-x: Likewise.
* tests/dd/skip-seek: Likewise.
* tests/envvar-check: Likewise.
* tests/mv/into-self-2: Likewise.
* tests/ls/color-dtype-dir: Don't rely on eval "`dircolors -b`"
to set LS_COLORS in the environment.
* tests/envvar-check: Instead, ensure that LS_COLORS is not set.
Reported by Bob Proulx.
cp/same-file test fail.
* tests/envvar-check (vars): Add TIME_STYLE to the list.
* tests/cp/same-file: Revert last change.
Source the envvar-check script, to ensure that TIME_STYLE
settings don't affect these tests.