Update comments

updater/lib/dependabot/dependency_snapshot.rb

@@ -130,7 +130,7 @@ def mark_group_handled(group, excluding_dependencies = Set.new)
         dependencies_in_existing_prs = dependencies_in_existing_pr_for_group(group)
 
         # also add dependencies that might be in the group, as a rebase would add them;
-        # this avoids individual PR creation that immediately is superseded by a group PR supersede.
+        # this avoids individual PR creation that immediately is superseded by a group PR supersede
         current_dependencies = group.dependencies.map(&:name).reject do |dep|
           excluding_dependencies.include?(dep)
         end

updater/lib/dependabot/updater/operations/refresh_group_update_pull_request.rb

@@ -115,10 +115,8 @@ def process_group_dependencies(job_group)
           # Preprocess to discover existing group PRs and add their dependencies to the handled list before processing
           # the refresh. This prevents multiple PRs from being created for the same dependency during the refresh.
           dependency_snapshot.groups.each do |group|
-            # We want to gather all the dependencies that are in existing PRs
-            # so that other groups will not consider them as handled when they
-            # are not also in the PR of the group being checked, preventing
-            # and erroneous PR closure.
+            # Gather all dependencies in existing PRs so other groups will not consider them as handled when they
+            # are not also in the PR of the group being checked, preventing erroneous PR closures
             group_pr_deps = dependency_snapshot.dependencies_in_existing_pr_for_group(group)
             existing_pr_dependencies.merge(group_pr_deps)