Refactor: Rename file_exist? to file_exists?

ee/app/models/concerns/geo/blob_replicator_strategy.rb

@@ -72,7 +72,7 @@ module Geo
     # we don't absolutely have to.
     #
     # @return [Boolean] whether the file exists on disk or in remote storage
-    def file_exist?
+    def file_exists?
       carrierwave_uploader.file.exists?
     end
 
@@ -90,7 +90,7 @@ module Geo
     #
     # @return [Boolean] whether it can generate a checksum
     def checksummable?
-      carrierwave_uploader.file_storage? && file_exist?
+      carrierwave_uploader.file_storage? && file_exists?
     end
   end
 end

ee/lib/gitlab/geo/replication/blob_retriever.rb

@@ -19,7 +19,7 @@ module Gitlab
 
         def execute
           return error("#{replicator.replicable_name} not found") unless recorded_file
-          return file_not_found(recorded_file) unless replicator.file_exist?
+          return file_not_found(recorded_file) unless replicator.file_exists?
           return error('Checksum mismatch') unless matches_checksum?
 
           success(replicator.carrierwave_uploader)

ee/spec/support/shared_examples/models/concerns/blob_replicator_strategy_shared_examples.rb

@@ -182,7 +182,7 @@ RSpec.shared_examples 'a blob replicator' do
 
       context 'when the file does not exist' do
         it 'raises an error' do
-          allow(subject).to receive(:file_exist?).and_return(false)
+          allow(subject).to receive(:file_exists?).and_return(false)
 
           expect { subject.calculate_checksum }.to raise_error('File is not checksummable')
         end