In Vim, you can "show whitespace characters" using
:set list
eol is shown with $ and \t show with ^I .

The Task Scheduler action "Send an e-mail" needs to be able to authenticate before sending.
To do this, I enabled the SMTP Feature in Windows, went into the firewall, disabled all the external access rules (just to be on the safe side), and allowed 127.0.0.1 to relay.
The Send Email action I set to use localhost for the SMTP server. The "From" setting is not used in the authentication process, rather the user account the Task is acting as.

The error messages I got through this process are:
Error Value: 2147746319 - Relay not permitted
Error Value: 2147746321 - Account not authenticating

Bash supports numerical looping by:
for (( I = 0; I < 10; I++ ));
do;
something;
done;
This includes variable substitutions, allowing the min/max to be set by variables.
BASH also supports
for I in {1..10};
but the numbers have to be hard coded (no variable substitution).

Bazaar has built-in support for working with SVN. You can do things like:
bzr branch https://path.to/svn/repo localfolder
and you can use it as a local bzr branch, then bzr push to push the changes to svn as a single commit, and bzr pull to merge upstream changes into your local branch.

The "-S" parameter to du lists each folders total on it's own, rather then including subfolders. Very useful for finding which specific folder has all the files in it.