Fixed Style/SpaceAroundOperators RuboCop offense

Bug: T111184
Change-Id: I442e5be94459d5a8bb497edad9fca900c4066ba1

.rubocop_todo.yml

@@ -6,13 +6,6 @@
 # Note that changes in the inspected code, or installation of new
 # versions of RuboCop, may require this file to be generated again.
 
-# Offense count: 1
-# Cop supports --auto-correct.
-# Configuration parameters: MultiSpaceAllowedForOperators.
-Style/SpaceAroundOperators:
-  Exclude:
-    - 'tests/browser/features/step_definitions/math_steps.rb'
-
 # Offense count: 2
 # Cop supports --auto-correct.
 # Configuration parameters: EnforcedStyleForEmptyBraces, SupportedStyles.

tests/browser/features/step_definitions/math_steps.rb

@@ -23,7 +23,7 @@ When(/^I click Preview$/) do
 end
 
 When(/^I type (.+)$/) do |write_text|
-  on(EditPage).article_text=write_text
+  on(EditPage).article_text = write_text
 end
 
 Then(/^alt for that img should be (.+)$/) do |alt|