runtime(syntax-tests): Introduce self tests for screen dumping Commit: https://github.com/vim/vim/commit/d2f49879990407b209f39397b9880f91f851a49a Author: Aliaksei Budavei <0x000c70@gmail.com> Date: Fri May 24 19:14:16 2024 +0300 runtime(syntax-tests): Introduce self tests for screen dumping Write a batch of test files with made-up syntax to serve for additional linewise checks to be manually performed whenever the algorithm for screen dump file generation is modified. Define a shell variable VIM_SYNTAX_SELF_TESTING to run these tests: cd runtime/syntax/ VIM_SYNTAX_SELF_TESTING=1 make clean test related: #15150 Signed-off-by: Aliaksei Budavei <0x000c70@gmail.com> Signed-off-by: Christian Brabandt <cb@256bit.org>