Fix EncodingWarning in test_tools. (GH-28846)

Lib/test/test_tools/test_fixcid.py

Lib/test/test_tools/test_gprof2html.py

Lib/test/test_tools/test_i18n.py

Lib/test/test_tools/test_lll.py

Lib/test/test_tools/test_pdeps.py

Lib/test/test_tools/test_pindent.py

Tools/scripts/gprof2html.py