[MERGE] core_concepts documentation corrections

[Gary Wilson Jr.]

Ian Clatworthy wrote:
> Gary Wilson Jr. wrote:
>> What about the indention of the lists?  The Apple Style Guide does not
>> seem to be geared for plain text documentation.  In the Python
>> documentation's reStructuredText Primer source [1], they put bullets in
>> the first column of the line.  My patch does the same.
> 
> I think that is a good convention. As I'm heading off now on holidays,
> can I ask you to make that an explicit guideline on the wiki page please?

Done.  http://bazaar-vcs.org/ContributingToTheDocs

Gary