patch 8.0.0198: some syntax arguments take effect even after "if 0" commit https://github.com/vim/vim/commit/de318c5c35ed0d65fd2a07196cb8acd5ee6d9bf8 Author: Bram Moolenaar <Bram@vim.org> Date: Tue Jan 17 16:27:10 2017 +0100 patch 8.0.0198: some syntax arguments take effect even after "if 0" Problem: Some syntax arguments take effect even after "if 0". (Taylor Venable) Solution: Properly skip the syntax statements. Make "syn case" and "syn conceal" report the current state. Fix that "syn clear" didn't reset the conceal flag. Add tests for :syntax skipping properly.

Tests for setting the '[,'] marks when joining lines.

STARTTEST
:so small.vim
:/^\t\t/
0gqj:
:let a=string(getpos("'[")).'/'.string(getpos("']"))
:/^This line/;'}-join
:let b=string(getpos("'[")).'/'.string(getpos("']"))
:$put ='First test: Start/End '.string(a)
:$put ='Second test: Start/End '.string(b)
:/^\t\t/,$wq! test.out
ENDTEST


		O sodales, ludite, vos qui
attamen consulite per voster honur. Tua pulchra facies me fay planszer milies

This line.
Should be joined with the next line
and with this line

Results: