Remap ]] and [[ to jump to next block end and beginning respectively

[hauleth]

My current mappings in after/ftplugin/elixir.vim:

let b:block_begin = '\<\(do$\|fn\>\)'
let b:block_end = '\<end\>'

nnoremap <buffer> <silent> <expr> ]] ':silent keeppatterns /'.b:block_begin.'<CR>'
nnoremap <buffer> <silent> <expr> [[ ':silent keeppatterns ?'.b:block_begin.'<CR>'
nnoremap <buffer> <silent> <expr> ][ ':silent keeppatterns /'.b:block_end  .'<CR>'
nnoremap <buffer> <silent> <expr> [] ':silent keeppatterns ?'.b:block_end  .'<CR>'

onoremap <buffer> <silent> <expr> ]] ':silent keeppatterns /'.b:block_begin.'<CR>'
onoremap <buffer> <silent> <expr> [[ ':silent keeppatterns ?'.b:block_begin.'<CR>'
onoremap <buffer> <silent> <expr> ][ ':silent keeppatterns /'.b:block_end  .'<CR>'
onoremap <buffer> <silent> <expr> [] ':silent keeppatterns ?'.b:block_end  .'<CR>'

However currently it jumps to next block. I do not know if community would prefer that or jumping to wrapping block instead. Up to discussion.