Add the less.vim macro
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" Vim script to work like "less"
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" Maintainer: Bram Moolenaar <Bram@vim.org>
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" Last Change: 2014 May 13
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" Avoid loading this file twice, allow the user to define his own script.
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if exists("loaded_less")
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finish
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endif
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let loaded_less = 1
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" If not reading from stdin, skip files that can't be read.
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" Exit if there is no file at all.
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if argc() > 0
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let s:i = 0
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while 1
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if filereadable(argv(s:i))
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if s:i != 0
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sleep 3
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endif
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break
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endif
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if isdirectory(argv(s:i))
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echomsg "Skipping directory " . argv(s:i)
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elseif getftime(argv(s:i)) < 0
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echomsg "Skipping non-existing file " . argv(s:i)
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else
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echomsg "Skipping unreadable file " . argv(s:i)
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endif
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echo "\n"
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let s:i = s:i + 1
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if s:i == argc()
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quit
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endif
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next
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endwhile
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endif
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set nocp
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syntax on
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set so=0
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set hlsearch
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set incsearch
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nohlsearch
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" Don't remember file names and positions
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set viminfo=
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set nows
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" Inhibit screen updates while searching
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let s:lz = &lz
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set lz
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" Used after each command: put cursor at end and display position
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if &wrap
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noremap <SID>L L0:redraw<CR>:file<CR>
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au VimEnter * normal! L0
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else
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noremap <SID>L Lg0:redraw<CR>:file<CR>
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au VimEnter * normal! Lg0
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endif
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" When reading from stdin don't consider the file modified.
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au VimEnter * set nomod
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" Can't modify the text
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set noma
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" Give help
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noremap h :call <SID>Help()<CR>
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map H h
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fun! s:Help()
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echo "<Space> One page forward b One page backward"
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echo "d Half a page forward u Half a page backward"
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echo "<Enter> One line forward k One line backward"
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echo "G End of file g Start of file"
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echo "N% percentage in file"
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echo "\n"
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echo "/pattern Search for pattern ?pattern Search backward for pattern"
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echo "n next pattern match N Previous pattern match"
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echo "\n"
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echo ":n<Enter> Next file :p<Enter> Previous file"
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echo "\n"
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echo "q Quit v Edit file"
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let i = input("Hit Enter to continue")
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endfun
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" Scroll one page forward
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noremap <script> <Space> :call <SID>NextPage()<CR><SID>L
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map <C-V> <Space>
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map f <Space>
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map <C-F> <Space>
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map <PageDown> <Space>
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map <kPageDown> <Space>
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map <S-Down> <Space>
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map z <Space>
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map <Esc><Space> <Space>
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fun! s:NextPage()
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if line(".") == line("$")
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if argidx() + 1 >= argc()
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" Don't quit at the end of the last file
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return
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endif
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next
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1
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else
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exe "normal! \<C-F>"
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endif
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endfun
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" Re-read file and page forward "tail -f"
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map F :e<CR>G<SID>L:sleep 1<CR>F
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" Scroll half a page forward
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noremap <script> d <C-D><SID>L
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map <C-D> d
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" Scroll one line forward
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noremap <script> <CR> <C-E><SID>L
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map <C-N> <CR>
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map e <CR>
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map <C-E> <CR>
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map j <CR>
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map <C-J> <CR>
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map <Down> <CR>
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" Scroll one page backward
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noremap <script> b <C-B><SID>L
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map <C-B> b
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map <PageUp> b
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map <kPageUp> b
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map <S-Up> b
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map w b
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map <Esc>v b
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" Scroll half a page backward
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noremap <script> u <C-U><SID>L
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noremap <script> <C-U> <C-U><SID>L
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" Scroll one line backward
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noremap <script> k <C-Y><SID>L
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map y k
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map <C-Y> k
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map <C-P> k
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map <C-K> k
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map <Up> k
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" Redraw
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noremap <script> r <C-L><SID>L
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noremap <script> <C-R> <C-L><SID>L
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noremap <script> R <C-L><SID>L
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" Start of file
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noremap <script> g gg<SID>L
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map < g
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map <Esc>< g
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map <Home> g
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map <kHome> g
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" End of file
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noremap <script> G G<SID>L
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map > G
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map <Esc>> G
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map <End> G
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map <kEnd> G
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" Go to percentage
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noremap <script> % %<SID>L
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map p %
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" Search
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noremap <script> / H$:call <SID>Forward()<CR>/
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if &wrap
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noremap <script> ? H0:call <SID>Backward()<CR>?
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else
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noremap <script> ? Hg0:call <SID>Backward()<CR>?
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endif
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fun! s:Forward()
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" Searching forward
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noremap <script> n H$nzt<SID>L
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if &wrap
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noremap <script> N H0Nzt<SID>L
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else
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noremap <script> N Hg0Nzt<SID>L
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endif
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cnoremap <silent> <script> <CR> <CR>:cunmap <lt>CR><CR>zt<SID>L
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endfun
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fun! s:Backward()
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" Searching backward
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if &wrap
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noremap <script> n H0nzt<SID>L
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else
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noremap <script> n Hg0nzt<SID>L
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endif
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noremap <script> N H$Nzt<SID>L
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cnoremap <silent> <script> <CR> <CR>:cunmap <lt>CR><CR>zt<SID>L
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endfun
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call s:Forward()
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cunmap <CR>
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" Quitting
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noremap q :q<CR>
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" Switch to editing (switch off less mode)
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map v :silent call <SID>End()<CR>
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fun! s:End()
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set ma
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if exists('s:lz')
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let &lz = s:lz
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endif
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unmap h
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unmap H
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unmap <Space>
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unmap <C-V>
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unmap f
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unmap <C-F>
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unmap z
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unmap <Esc><Space>
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unmap F
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unmap d
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unmap <C-D>
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unmap <CR>
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unmap <C-N>
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unmap e
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unmap <C-E>
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unmap j
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unmap <C-J>
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unmap b
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unmap <C-B>
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unmap w
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unmap <Esc>v
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unmap u
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unmap <C-U>
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unmap k
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unmap y
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unmap <C-Y>
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unmap <C-P>
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unmap <C-K>
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unmap r
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unmap <C-R>
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unmap R
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unmap g
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unmap <
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unmap <Esc><
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unmap G
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unmap >
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unmap <Esc>>
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unmap %
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unmap p
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unmap n
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unmap N
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unmap q
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unmap v
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unmap /
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unmap ?
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unmap <Up>
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unmap <Down>
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unmap <PageDown>
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unmap <kPageDown>
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unmap <PageUp>
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unmap <kPageUp>
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unmap <S-Down>
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unmap <S-Up>
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unmap <Home>
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unmap <kHome>
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unmap <End>
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unmap <kEnd>
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endfun
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" vim: sw=2
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