Improve readability of information_only dependency check

Co-authored-by: David Rodriguez <[email protected]>

Author: mctofu

common/lib/dependabot/dependency.rb

@@ -115,6 +115,13 @@ def all_versions
       all_versions.filter_map(&:version)
     end
 
+    # This dependency is being indirectly updated by an update to another
+    # dependency. We don't need to try and update it ourselves but want to
+    # surface it to the user in the PR.
+    def informational_only?
+      metadata[:information_only]
+    end
+
     def ==(other)
       other.instance_of?(self.class) && to_h == other.to_h
     end

updater/lib/dependabot/updater.rb

@@ -736,7 +736,7 @@ def generate_dependency_files_for(updated_dependencies)
       # Ignore dependencies that are tagged as information_only. These will be
       # updated indirectly as a result of a parent dependency update and are
       # only included here to be included in the PR info.
-      deps_to_update = updated_dependencies.reject { |d| d.metadata[:information_only] }
+      deps_to_update = updated_dependencies.reject(&:informational_only?)
       updater = file_updater_for(deps_to_update)
       updater.updated_dependency_files
     end