Change syntax format for example returned values

According to our guideline, we leave 1 space between `#` and `=>`, so we
want `# =>` instead of `#=>`.

Thanks to @fxn for the suggestion.

[ci skip]

4 files changed, 19 insertions, 19 deletions

diff --git a/activerecord/lib/active_record/associations/collection_proxy.rb b/activerecord/lib/active_record/associations/collection_proxy.rb
index 2e70a07962..0b37ecf5b7 100644
--- a/activerecord/lib/active_record/associations/collection_proxy.rb
+++ b/activerecord/lib/active_record/associations/collection_proxy.rb
@@ -787,12 +787,12 @@ module ActiveRecord
       #     has_many :pets
       #   end
       #
-      #   person.pets.count #=> 1
-      #   person.pets.many? #=> false
+      #   person.pets.count # => 1
+      #   person.pets.many? # => false
       #
       #   person.pets << Pet.new(name: 'Snoopy')
-      #   person.pets.count #=> 2
-      #   person.pets.many? #=> true
+      #   person.pets.count # => 2
+      #   person.pets.many? # => true
       #
       # You can also pass a block to define criteria. The
       # behavior is the same, it returns true if the collection
diff --git a/activerecord/lib/active_record/associations/join_dependency.rb b/activerecord/lib/active_record/associations/join_dependency.rb
index c3ac0680ea..3e743c4bfe 100644
--- a/activerecord/lib/active_record/associations/join_dependency.rb
+++ b/activerecord/lib/active_record/associations/join_dependency.rb
@@ -83,14 +83,14 @@ module ActiveRecord
       #  end
       #
       #  If I execute `@physician.patients.to_a` then
-      #    base #=> Physician
-      #    associations #=> []
-      #    joins #=>  [#<Arel::Nodes::InnerJoin: ...]
+      #    base # => Physician
+      #    associations # => []
+      #    joins # =>  [#<Arel::Nodes::InnerJoin: ...]
       #
       #  However if I execute `Physician.joins(:appointments).to_a` then
-      #    base #=> Physician
-      #    associations #=> [:appointments]
-      #    joins #=>  []
+      #    base # => Physician
+      #    associations # => [:appointments]
+      #    joins # =>  []
       #
       def initialize(base, associations, joins)
         @alias_tracker = AliasTracker.new(base.connection, joins)
diff --git a/activerecord/lib/active_record/associations/join_dependency/join_association.rb b/activerecord/lib/active_record/associations/join_dependency/join_association.rb
index 191d430636..84e18684d8 100644
--- a/activerecord/lib/active_record/associations/join_dependency/join_association.rb
+++ b/activerecord/lib/active_record/associations/join_dependency/join_association.rb
@@ -86,11 +86,11 @@ module ActiveRecord
         #  end
         #
         #  If I execute `Physician.joins(:appointments).to_a` then
-        #    reflection    #=> #<ActiveRecord::Reflection::AssociationReflection @macro=:has_many ...>
-        #    table         #=> #<Arel::Table @name="appointments" ...>
-        #    key           #=>  physician_id
-        #    foreign_table #=> #<Arel::Table @name="physicians" ...>
-        #    foreign_key   #=> id
+        #    reflection    # => #<ActiveRecord::Reflection::AssociationReflection @macro=:has_many ...>
+        #    table         # => #<Arel::Table @name="appointments" ...>
+        #    key           # =>  physician_id
+        #    foreign_table # => #<Arel::Table @name="physicians" ...>
+        #    foreign_key   # => id
         #
         def build_constraint(klass, table, key, foreign_table, foreign_key)
           constraint = table[key].eq(foreign_table[foreign_key])
diff --git a/activerecord/lib/active_record/relation/query_methods.rb b/activerecord/lib/active_record/relation/query_methods.rb
index 62c555f6d6..a9dbc14d6e 100644
--- a/activerecord/lib/active_record/relation/query_methods.rb
+++ b/activerecord/lib/active_record/relation/query_methods.rb
@@ -552,9 +552,9 @@ module ActiveRecord
 
     # Allows you to change a previously set where condition for a given attribute, instead of appending to that condition.
     #
-    #   Post.where(trashed: true).where(trashed: false)                       #=> WHERE `trashed` = 1 AND `trashed` = 0
-    #   Post.where(trashed: true).rewhere(trashed: false)                     #=> WHERE `trashed` = 0
-    #   Post.where(active: true).where(trashed: true).rewhere(trashed: false) #=> WHERE `active` = 1 AND `trashed` = 0
+    #   Post.where(trashed: true).where(trashed: false)                       # => WHERE `trashed` = 1 AND `trashed` = 0
+    #   Post.where(trashed: true).rewhere(trashed: false)                     # => WHERE `trashed` = 0
+    #   Post.where(active: true).where(trashed: true).rewhere(trashed: false) # => WHERE `active` = 1 AND `trashed` = 0
     #
     # This is short-hand for unscope(where: conditions.keys).where(conditions). Note that unlike reorder, we're only unscoping
     # the named conditions -- not the entire where statement.
@@ -701,7 +701,7 @@ module ActiveRecord
     # Specifies table from which the records will be fetched. For example:
     #
     #   Topic.select('title').from('posts')
-    #   #=> SELECT title FROM posts
+    #   # => SELECT title FROM posts
     #
     # Can accept other relation objects. For example:
     #