RE: blank-mode.el

[Drew Adams]

> It seems there is an interest to install blank-mode package in the Emacs
> distribution. blank-mode is a minor mode to visualise blanks (SPACE,
> HARD SPACE and TAB). blank-mode uses two ways to visualise blanks:
> faces and display table.
...
> The `blank-style' and `blank-chars' variables are used to select which way
> should be used to visualise blanks. To see some screenshots and
documentation:
>     http://www.emacswiki.org/cgi-bin/wiki/BlankMode

I am in favor of it.

User option `blank-chars' specifies which blank characters to highlight, but
it would be good to also have commands to toggle each highlighting type. For
example, `M-x blank-toggle-trailing' and `M-x blank-toggle-tabs'. And it
would be good to have this for both local and global use:
`blank-toggle-tabs-global', in addition to `blank-toggle-tabs'.

There are a few other libraries at
http://www.emacswiki.org/cgi-bin/wiki/ShowWhiteSpace. I think Vinicius's
approach might be the best, but it would be good to take a look at the
others for possible features (such as the selectivity commands mentioned
above).