Grammar fix [ci skip]

rails · Sep 2, 2016 · e88a745 · e88a745
1 parent db63406
commit e88a745
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/guides/source/association_basics.md b/guides/source/association_basics.md
@@ -1007,7 +1007,7 @@ class Author < ApplicationRecord
 end
 ```
 
-In this case, saving or destroying an book will update the timestamp on the associated author. You can also specify a particular timestamp attribute to update:
+In this case, saving or destroying a book will update the timestamp on the associated author. You can also specify a particular timestamp attribute to update:
 
 ```ruby
 class Book < ApplicationRecord