metomi/rose#1028: fix launcher bug for unknown configuration
Merge pull request #1029 from benfitzpatrick/1028.rose-edit-fix-file-browser-unknown

#1028: fix file browser launch bug for unknown configuration
rose bush: do not apply prettify to normal files
metomi/rose#955: add rose edit support for optional source content
metomi/rose#955: rose edit: file page: preserve optional
rose bush: fix prettify call
Merge pull request #1031 from benfitzpatrick/rose-bush.no-prettify-default

rose bush: do not apply prettify to normal files
Update CHANGES.md
Merge pull request #1033 from benfitzpatrick/955.rose-edit-file-ignored-source-content

#955: rose edit: support file optional source content
metomi/rose#1034: fix orphaned warning
Update CHANGES.md
rose edit: fix optional source bug
metomi/rose#1036: rose edit fix enable empty user-ignored section
Merge pull request #1038 from benfitzpatrick/rose-edit.fix-optional-source

rose edit: fix optional source bug
Merge pull request #1039 from benfitzpatrick/rose-edit-fix-enable-user-ignore-section

#1036: rose edit: fix enable empty user-ignored section
Merge pull request #1035 from benfitzpatrick/1034.rose-edit-fix-orphaned-optional

#1034: fix rose edit orphaned warning for optional content sections
Update CHANGES.md
rose documentation: fix and tidy
rose documentation: fix and tweak
RUG: add simple example suite