Add an alias that reads well when used with non-default batch size.

Author: mostlyobvious

ruby_event_store/lib/ruby_event_store/specification.rb

@@ -88,6 +88,7 @@ def each
     def in_batches(batch_size = DEFAULT_BATCH_SIZE)
       Specification.new(repository, mapper, result.dup.tap { |r| r.batch_size = batch_size })
     end
+    alias :in_batches_of :in_batches
 
     private
     attr_reader :repository, :mapper

ruby_event_store/spec/specification_spec.rb

@@ -279,6 +279,11 @@ module RubyEventStore
       end
     end
 
+    specify do
+      expect(specification.in_batches_of.result).to       eq(specification.in_batches.result)
+      expect(specification.in_batches_of(1000).result).to eq(specification.in_batches(1000).result)
+    end
+
     let(:repository)    { InMemoryRepository.new }
     let(:mapper)        { Mappers::Default.new }
     let(:specification) { Specification.new(repository, mapper) }