+ Run examples embedded in documentation
+ Say you have a function that adds 7 to things:
+ function res = add7(num)
+ Save that to 'add7.m'. Now you can say 'doctest add7' and it will run
+ 'add7(3)' and make sure that it gets back 'ans = 10'.
+ The examples MUST END with either the END OF THE DOCUMENTATION or TWO
+ BLANK LINES (or anyway, lines with just the comment marker % and nothing
+ All adjascent white space is collapsed into a single space before
+ comparison, so right now it can't detect anything that's purely a
+ It can't run lines that are longer than one line of code (so, for
+ example, no loops that take more than one line). This is difficult
+ because I haven't found a good way to mark these subsequent lines as
+ part-of-the-source-code rather than part-of-the-result.