:h
  script
  vim-script-intro

  function-list - list of functions
    list-functions
    string-functions




http://learnvimscriptthehardway.stevelosh.com/

if filereadable(expand("~/.vim/gvimrc.local"))
  source ~/.vim/gvimrc.local


:type(varname)
  variable type
    Number:     0
    String:     1
    Funcref:    2
    List:       3
    Dictionary: 4
    Float:      5


:mess[ages]
  show last messages

:set verbose=
:set verbosefile=
  http://stackoverflow.com/questions/3025615/is-there-a-vim-runtime-log