Defining commands in Vim

Suppose that you have created a function that replaces <k>Ctrl</k> with <kbd>Ctrl</kbd> (this is useful in protips to save some time ;)

function! ReplaceKbd()
    " <kbd>Ctrl</kbd> => <kbd>Ctrl</kbd>

In order to call that function you have to type :call ReplaceKbd(), which can soon become boring. Let’s save some key strokes by defining a command:

command ReplaceKbd :call ReplaceKbd()

Now you only have to type: :ReplaceKbd(). This is the same kind of a method like :GundoShow, :Gwrite and the like.
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