docs:vim:folding_tests [hartungdesign.net wiki]

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====== folding tests ======
These tests are just to play with some folding ideas to see how different things can be done.

===== how to use =====
  - load an example file of the specified language into vim
  - type :new to split the window with an empty buffer
  - type this to map the F5 key (or pick another one) to execute our test syntax and folding in the opposite window<code>
:map <F5> ggVGy<C-w><C-w>:@"<CR>
</code>
  - copy the corresponding code block from below into the new empty buffer
  - while in the empty buffer, press F5 to execute the code block on the opposite buffer window

===== html =====
<code>
syn clear
syn case ignore

syn region html start=/<\z\(html\)>/ end=/<\/\z1.*>/ contains=ALL fold
syn region head start=/<\z\(head\)>/ end=/<\/\z1.*>/ contains=ALLBUT,html,body fold
syn region body start=/<\z\(body\)\s*.*>/ end=/<\/\z1.*>/ contains=ALLBUT,html,head,body fold
syn region element start=/<\z\(style\|script\|form\|table\|ul\|ol\|div\).*>/ end=/<\/\z1.*>/ contains=ALLBUT,html,head,body fold
syn region comment start=/<!--/ end=/-->/ contains=ALLBUT,comment

set fen
set foldnestmax=20
set foldlevel=0
set foldmethod=syntax
syn sync fromstart
</code>