Replace `#=>` with `# =>` [ci skip]

@rafaelfranca suggested in f7c7bcd9 that code examples should display
the result after  `# =>` and not after `#=>`.

This commit replaces *all* the occurrences of `#=>` in the code documentation
(mostly added by me 😭) with the suggested `# =>`.

activesupport/lib/active_support/core_ext/hash/deep_merge.rb

@@ -4,7 +4,7 @@ class Hash
   #   h1 = { a: true, b: { c: [1, 2, 3] } }
   #   h2 = { a: false, b: { x: [3, 4, 5] } }
   #
-  #   h1.deep_merge(h2) #=> { a: false, b: { c: [1, 2, 3], x: [3, 4, 5] } }
+  #   h1.deep_merge(h2) # => { a: false, b: { c: [1, 2, 3], x: [3, 4, 5] } }
   #
   # Like with Hash#merge in the standard library, a block can be provided
   # to merge values:

activesupport/lib/active_support/core_ext/module/attribute_accessors.rb

@@ -203,7 +203,7 @@ def #{sym}=(obj)
   #     include HairColors
   #   end
   #
-  #   Person.class_variable_get("@@hair_colors") #=> [:brown, :black, :blonde, :red]
+  #   Person.class_variable_get("@@hair_colors") # => [:brown, :black, :blonde, :red]
   def mattr_accessor(*syms, &blk)
     mattr_reader(*syms, &blk)
     mattr_writer(*syms, &blk)

activesupport/lib/active_support/core_ext/numeric/bytes.rb

@@ -8,7 +8,7 @@ class Numeric
 
   # Enables the use of byte calculations and declarations, like 45.bytes + 2.6.megabytes
   #
-  #   2.bytes #=> 2
+  #   2.bytes # => 2
   def bytes
     self
   end
@@ -16,7 +16,7 @@ def bytes
 
   # Returns the number of bytes equivalent to the kilobytes provided.
   #
-  #   2.kilobytes #=> 2048
+  #   2.kilobytes # => 2048
   def kilobytes
     self * KILOBYTE
   end
@@ -24,7 +24,7 @@ def kilobytes
 
   # Returns the number of bytes equivalent to the megabytes provided.
   #
-  #   2.megabytes #=> 2_097_152
+  #   2.megabytes # => 2_097_152
   def megabytes
     self * MEGABYTE
   end
@@ -32,7 +32,7 @@ def megabytes
 
   # Returns the number of bytes equivalent to the gigabytes provided.
   #
-  #   2.gigabytes #=> 2_147_483_648
+  #   2.gigabytes # => 2_147_483_648
   def gigabytes
     self * GIGABYTE
   end
@@ -40,7 +40,7 @@ def gigabytes
 
   # Returns the number of bytes equivalent to the terabytes provided.
   #
-  #   2.terabytes #=> 2_199_023_255_552
+  #   2.terabytes # => 2_199_023_255_552
   def terabytes
     self * TERABYTE
   end
@@ -48,7 +48,7 @@ def terabytes
 
   # Returns the number of bytes equivalent to the petabytes provided.
   #
-  #   2.petabytes #=> 2_251_799_813_685_248
+  #   2.petabytes # => 2_251_799_813_685_248
   def petabytes
     self * PETABYTE
   end
@@ -56,7 +56,7 @@ def petabytes
 
   # Returns the number of bytes equivalent to the exabytes provided.
   #
-  #   2.exabytes #=> 2_305_843_009_213_693_952
+  #   2.exabytes # => 2_305_843_009_213_693_952
   def exabytes
     self * EXABYTE
   end

activesupport/lib/active_support/core_ext/object/try.rb

@@ -21,11 +21,11 @@ class Object
   #
   # +try+ will also return +nil+ if the receiver does not respond to the method:
   #
-  #   @person.try(:non_existing_method) #=> nil
+  #   @person.try(:non_existing_method) # => nil
   #
   # instead of
   #
-  #   @person.non_existing_method if @person.respond_to?(:non_existing_method) #=> nil
+  #   @person.non_existing_method if @person.respond_to?(:non_existing_method) # => nil
   #
   # +try+ returns +nil+ when called on +nil+ regardless of whether it responds
   # to the method:

activesupport/lib/active_support/core_ext/thread.rb

@@ -67,8 +67,8 @@ def thread_variable?(key)
   #
   #   me = Thread.current
   #   me.freeze
-  #   me.thread_variable_set(:oliver, "a")  #=> RuntimeError: can't modify frozen thread locals
-  #   me[:oliver] = "a"                     #=> RuntimeError: can't modify frozen thread locals
+  #   me.thread_variable_set(:oliver, "a")  # => RuntimeError: can't modify frozen thread locals
+  #   me[:oliver] = "a"                     # => RuntimeError: can't modify frozen thread locals
   def freeze
     _locals.freeze
     super

activesupport/lib/active_support/core_ext/time/zones.rb

@@ -55,12 +55,12 @@ def use_zone(time_zone)
     # Accepts the time zone in any format supported by <tt>Time.zone=</tt>.
     # Raises an ArgumentError for invalid time zones.
     #
-    #   Time.find_zone! "America/New_York" #=> #<ActiveSupport::TimeZone @name="America/New_York" ...>
-    #   Time.find_zone! "EST"              #=> #<ActiveSupport::TimeZone @name="EST" ...>
-    #   Time.find_zone! -5.hours           #=> #<ActiveSupport::TimeZone @name="Bogota" ...>
-    #   Time.find_zone! nil                #=> nil
-    #   Time.find_zone! false              #=> false
-    #   Time.find_zone! "NOT-A-TIMEZONE"   #=> ArgumentError: Invalid Timezone: NOT-A-TIMEZONE
+    #   Time.find_zone! "America/New_York" # => #<ActiveSupport::TimeZone @name="America/New_York" ...>
+    #   Time.find_zone! "EST"              # => #<ActiveSupport::TimeZone @name="EST" ...>
+    #   Time.find_zone! -5.hours           # => #<ActiveSupport::TimeZone @name="Bogota" ...>
+    #   Time.find_zone! nil                # => nil
+    #   Time.find_zone! false              # => false
+    #   Time.find_zone! "NOT-A-TIMEZONE"   # => ArgumentError: Invalid Timezone: NOT-A-TIMEZONE
     def find_zone!(time_zone)
       if !time_zone || time_zone.is_a?(ActiveSupport::TimeZone)
         time_zone
@@ -85,8 +85,8 @@ def find_zone!(time_zone)
     # Accepts the time zone in any format supported by <tt>Time.zone=</tt>.
     # Returns +nil+ for invalid time zones.
     #
-    #   Time.find_zone "America/New_York" #=> #<ActiveSupport::TimeZone @name="America/New_York" ...>
-    #   Time.find_zone "NOT-A-TIMEZONE"   #=> nil
+    #   Time.find_zone "America/New_York" # => #<ActiveSupport::TimeZone @name="America/New_York" ...>
+    #   Time.find_zone "NOT-A-TIMEZONE"   # => nil
     def find_zone(time_zone)
       find_zone!(time_zone) rescue nil
     end

activesupport/lib/active_support/notifications/instrumenter.rb

@@ -68,7 +68,7 @@ def initialize(name, start, ending, transaction_id, payload)
       #     sleep 1
       #   end
       #
-      #   @event.duration #=> 1000.138
+      #   @event.duration # => 1000.138
       def duration
         @duration ||= 1000.0 * (self.end - time)
       end