Fix typos, style in RUNNING_TESTS documentation

Signed-off-by: Alex Coles <alex@alexbcoles.com>
Add specs
Fix preview
Adds permission specs
Fix preview permissions
Fix work package preview permission
Make preview a normal view
Add 'nothing to preview' message
Authorize through #find_optional_project
Reset order of preview texts
Add preview object authorization specs
Authorize preview object access
Preview caption reflects the previewed attribute
Add cuke
Fixes Spent Time not localized
Fixes Comparison of history versions in wiki pages ignores newlines
Merge branch 'bugfix/2280_spent_time_not_localized' into dev
Add changelog entry
Merge pull request #1050 from netfighter/bugfix/3148_comparison_of_history_versions
Add changelog entry