vim

copy contents to/from files

to copy the contents into a file 

:r <filename>
or 
:"qY # yank out of first file
:"qP # put into second file
or read range of lines 
:r! sed -n <n>,<m>p /path/to/file.md

to copy the contents to a new file 

:<n>,<m> w <filename>
where <n> and <m> are numbers or symbols that designate range of lines

text wrap

(wrap to column) wrap current line 

gqq

wrap entire file 

gqG

wrap paragraph using visual selection 

V}gq

also use visual or visual block with gq

spell

using_spellcheck check spelling 

Spell

move to word 

]s [s

and see results 

z=

turn off highlighting 

set nospell

buffers