Merge branch 'pl-ruby-deprecation-warnings-git-diff' into 'master'

Fix kwargs deprecation warnings in git diff specs

See merge request gitlab-org/gitlab!51573

spec/lib/gitlab/git/diff_spec.rb

@@ -58,7 +58,7 @@ EOT
 
       context 'using a diff that is too large' do
         it 'prunes the diff' do
-          diff = described_class.new(diff: 'a' * 204800)
+          diff = described_class.new({ diff: 'a' * 204800 })
 
           expect(diff.diff).to be_empty
           expect(diff).to be_too_large