Fix grammar `a` to `an` [ci skip]

4 files changed, 4 insertions, 4 deletions

diff --git a/activerecord/lib/active_record/callbacks.rb b/activerecord/lib/active_record/callbacks.rb
index 854f9776a3..1f1b11eb68 100644
--- a/activerecord/lib/active_record/callbacks.rb
+++ b/activerecord/lib/active_record/callbacks.rb
@@ -179,7 +179,7 @@ module ActiveRecord
   #
   # If the +before_validation+ callback throws +:abort+, the process will be
   # aborted and {ActiveRecord::Base#save}[rdoc-ref:Persistence#save] will return +false+.
-  # If {ActiveRecord::Base#save!}[rdoc-ref:Persistence#save!] is called it will raise a ActiveRecord::RecordInvalid exception.
+  # If {ActiveRecord::Base#save!}[rdoc-ref:Persistence#save!] is called it will raise an ActiveRecord::RecordInvalid exception.
   # Nothing will be appended to the errors object.
   #
   # == Canceling callbacks
diff --git a/activerecord/lib/active_record/relation/finder_methods.rb b/activerecord/lib/active_record/relation/finder_methods.rb
index a4280c5f33..75482cb381 100644
--- a/activerecord/lib/active_record/relation/finder_methods.rb
+++ b/activerecord/lib/active_record/relation/finder_methods.rb
@@ -330,7 +330,7 @@ module ActiveRecord
     end
 
     # This method is called whenever no records are found with either a single
-    # id or multiple ids and raises a ActiveRecord::RecordNotFound exception.
+    # id or multiple ids and raises an ActiveRecord::RecordNotFound exception.
     #
     # The error message is different depending on whether a single id or
     # multiple ids are provided. If multiple ids are provided, then the number
diff --git a/activerecord/lib/active_record/sanitization.rb b/activerecord/lib/active_record/sanitization.rb
index 2bfc5ff7ae..a9e1fd0dad 100644
--- a/activerecord/lib/active_record/sanitization.rb
+++ b/activerecord/lib/active_record/sanitization.rb
@@ -60,7 +60,7 @@ module ActiveRecord
       end
 
       # Accepts an array, or string of SQL conditions and sanitizes
-      # them into a valid SQL fragment for a ORDER clause.
+      # them into a valid SQL fragment for an ORDER clause.
       #
       #   sanitize_sql_for_order(["field(id, ?)", [1,3,2]])
       #   # => "field(id, 1,3,2)"
diff --git a/activerecord/lib/active_record/validations.rb b/activerecord/lib/active_record/validations.rb
index 6677e6dc5f..ecaf04e39e 100644
--- a/activerecord/lib/active_record/validations.rb
+++ b/activerecord/lib/active_record/validations.rb
@@ -45,7 +45,7 @@ module ActiveRecord
     end
 
     # Attempts to save the record just like {ActiveRecord::Base#save}[rdoc-ref:Base#save] but
-    # will raise a ActiveRecord::RecordInvalid exception instead of returning +false+ if the record is not valid.
+    # will raise an ActiveRecord::RecordInvalid exception instead of returning +false+ if the record is not valid.
     def save!(options={})
       perform_validations(options) ? super : raise_validation_error
     end