Correct example of rose_prune builtin application in documentation
Merge pull request #793 from dpmatthews/prune-doc-fix

rose_prune: Correct example in documentation
Add Summary slide to rose-rug-files
Whitespace correction.
rosie go in <code> tags
Merge pull request #794 from arjclark/suites-I-conclusion

rose documentation: add summary slide to end of rug:suite files and rosie
Remove rogue fullstop.
Merge pull request #795 from arjclark/cylc-pres-typo

rose documentation: remove rogue fullstop from cylc slides