Dangerfile in danger-todoist-1.2.3 vs Dangerfile in danger-todoist-1.3.0

@@ -1,21 +1,27 @@
+is_wip = github.pr_title.include? "[WIP]"
+is_trivial = github.pr_title.include? "[trivial]"
+is_big_pr = git.lines_of_code > 500
+has_insufficient_description = github.pr_body.length < 5
+has_updated_changelog = git.modified_files.include?("CHANGELOG.md")
+
 # Make it more obvious that a PR is a work in progress and shouldn't be merged yet
-warn("PR is classed as Work in Progress") if github.pr_title.include? "[WIP]"
+warn("PR is classed as Work in Progress") if is_wip
 
 # Warn when there is a big PR
-warn("Big PR") if git.lines_of_code > 500
+warn("Wow that's a lot of changes. Can we split this up?") if is_big_pr
 
 # Reminder to add changelog entry
-unless git.modified_files.include?("CHANGELOG.md")
+if !has_updated_changelog && !is_trivial
   fail("Please include a CHANGELOG entry.", sticky: false)
 end
 
 # Identify leftover todos
 todoist.message = "There are still some things to do in this PR."
 todoist.warn_for_todos
 todoist.print_todos_table
 
 # Mainly to encourage writing up some reasoning about the PR, rather than
 # just leaving a title
-if github.pr_body.length < 5
+if has_insufficient_description
   fail "Please provide a summary in the Pull Request description"
 end