indent_lines(
input,ind,exclude) ->indented
Indent an array of lines by a given amount
When indent is a number, prepends \027[0m followed by that many
spaces to each line (the reset escape prevents colour bleed). When
indent is a string, it is used verbatim as the prefix. A value of 0
returns the input unchanged.
exclude is a table whose keys are 1-based line indices; those lines are
copied through without indentation. Example: {[1] = true} skips the
first line.
input may be either an array of strings or a raw string (which is split
on newlines first).