>> How can I add some char before a block? Just like C++
>> comment.
>
> Use V to select the block you want, then type :s/^/\/\//
You can make this a little easier/shorter to type by using
:s!^!//
The alternative delimiters (you can use a variety of characters,
though I tend to choose "!", "@", or "#") allow you to include
certain characters without concern for having to escape the
primary delimiter.
There's also blockwise-visual mode:
:help v_b_I
which can also be an easy/lazy way to do it, especially if you're
already in blockwise-visual mode.
-tim
