======Synopsis:======
[[set]] pad_char [<character>]

======Description:======
If this variable is set, the character it is set to will be used to pad
right-aligned text, instead of using spaces.  It can be set to a space,
or unset, to return to the default behavior.

======Other Notes:======
This variable can actually be set to a string of any length.  However,
only the first character is actually significant in this context.