When I went to add in support for text indentation for Evolution,
I found the following:

* if a line starts with one or more tabs, these can be found by looking for
  '\t' characters.
* if there is a single space at the start of the line, I can find it
  by looking for ' '.
* if there are two spaces at the start of the line, then the first two
  characters are \302 and \240.
* if there are three spaces at the start of the line, then there are two
  occurances of \302 followed by \240 (i.e. \302\240\302\240...)
* and so on.

Currently speakTextIndentation() is not catching those \302\240 sequences.