Test-case filenames should always begin with the associated
filetype name, properly delimited from the remaining part of
the filename. As of v9.2.0636~1, a convenience function
"DeferRenamingTestFileTo" is provided in "VIM_TEST_SETUP"
aware contexts to temporarily give the file under test
another, arbitrary name before executing ":syntax on".
closes: #21352
Signed-off-by: Aliaksei Budavei <0x000c70@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>