Merge pull request #26825 from orhantoy/fix-doc-code-indentation

[ci skip] Fix indentation of code examples

activerecord/lib/active_record/connection_adapters/abstract/schema_definitions.rb

@@ -475,7 +475,7 @@ def column(column_name, type, options = {})
 
       # Checks to see if a column exists.
       #
-      # t.string(:name) unless t.column_exists?(:name, :string)
+      #  t.string(:name) unless t.column_exists?(:name, :string)
       #
       # See {connection.column_exists?}[rdoc-ref:SchemaStatements#column_exists?]
       def column_exists?(column_name, type = nil, options = {})
@@ -496,9 +496,9 @@ def index(column_name, options = {})
 
       # Checks to see if an index exists.
       #
-      # unless t.index_exists?(:branch_id)
-      #   t.index(:branch_id)
-      # end
+      #  unless t.index_exists?(:branch_id)
+      #    t.index(:branch_id)
+      #  end
       #
       # See {connection.index_exists?}[rdoc-ref:SchemaStatements#index_exists?]
       def index_exists?(column_name, options = {})