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August 29, 2015 14:12
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Map <leader>[a-zA-Z] to show an error, unless already mapped
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| for ch in split('abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ', '\zs') | |
| if mapcheck('<leader>' . ch, 'n') == "" | |
| execute 'nnoremap <leader>' . ch . ' :echoerr "Unassigned mapping"<cr>' | |
| endif | |
| endfor |
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