Merge pull request #12857 from kuldeepaggarwal/f-indentation

updated documentation for Integer [ci skip]

activesupport/lib/active_support/core_ext/integer/multiple.rb

 class Integer
   # Check whether the integer is evenly divisible by the argument.
   #
-  #   0.multiple_of?(0)  #=> true
-  #   6.multiple_of?(5)  #=> false
-  #   10.multiple_of?(2) #=> true
+  #   0.multiple_of?(0)  # => true
+  #   6.multiple_of?(5)  # => false
+  #   10.multiple_of?(2) # => true
   def multiple_of?(number)
     number != 0 ? self % number == 0 : zero?
   end