style: Spacing updates

instrumentation/base/lib/opentelemetry/instrumentation/base.rb

@@ -4,7 +4,6 @@
 #
 # SPDX-License-Identifier: Apache-2.0
 
-
 module OpenTelemetry
   module Instrumentation
     # The Base class holds all metadata and configuration for an

instrumentation/rack/lib/opentelemetry/instrumentation/rack/instrumentation.rb

@@ -32,6 +32,7 @@ class Instrumentation < OpenTelemetry::Instrumentation::Base
         option :use_rack_events,          default: true,  validate: :boolean
         # TODO: This option currently exclusively uses the event handler, should we support old and new Rack?
         option :send_metrics,             default: false, validate: :boolean
+
         # Temporary Helper for Sinatra and ActionPack middleware to use during installation
         #
         # @example Default usage
@@ -48,7 +49,6 @@ def middleware_args
           end
         end
 
-
         private
 
         def require_dependencies

instrumentation/rack/lib/opentelemetry/instrumentation/rack/middlewares/event_handler.rb

@@ -158,7 +158,6 @@ def untraced_request?(env)
             false
           end
 
-
           # https://github.com/open-telemetry/opentelemetry-specification/blob/master/specification/data-http.md#name
           #
           # recommendation: span.name(s) should be low-cardinality (e.g.,
@@ -281,7 +280,11 @@ def meter
           def http_server_request_duration_histogram
             return unless metrics_enabled?
 
-            @http_server_request_duration_histogram ||= meter.create_histogram('http.server.request.duration', unit: 's', description: 'Duration of HTTP server requests.')
+            @http_server_request_duration_histogram ||= meter.create_histogram(
+              'http.server.request.duration', 
+              unit: 's', 
+              description: 'Duration of HTTP server requests.'
+            )
           end
 
           def record_http_server_request_duration_metric(span)
@@ -290,7 +293,7 @@ def record_http_server_request_duration_metric(span)
             # end - start / a billion to convert nanoseconds to seconds
             duration = (span.end_timestamp - span.start_timestamp) / Float(10**9)
             # glean attributes
-            attrs = span.attributes.select {|k, _v| HTTP_SERVER_REQUEST_DURATION_ATTRS_FROM_SPAN.include?(k) }
+            attrs = span.attributes.select { |k, _v| HTTP_SERVER_REQUEST_DURATION_ATTRS_FROM_SPAN.include?(k) }
             # set error
             attrs['error.type'] = span.status.description if span.status.code == OpenTelemetry::Trace::Status::ERROR