[ci skip] builtin -> built-in

3 files changed, 4 insertions, 4 deletions

diff --git a/guides/source/active_support_core_extensions.md b/guides/source/active_support_core_extensions.md
index 87d780eca9..5a4e15cfa9 100644
--- a/guides/source/active_support_core_extensions.md
+++ b/guides/source/active_support_core_extensions.md
@@ -761,7 +761,7 @@ Arguments may be bare constant names:
 Math.qualified_const_get("E") # => 2.718281828459045
 ```
 
-These methods are analogous to their builtin counterparts. In particular,
+These methods are analogous to their built-in counterparts. In particular,
 `qualified_constant_defined?` accepts an optional second argument to be
 able to say whether you want the predicate to look in the ancestors.
 This flag is taken into account for each constant in the expression while
@@ -792,7 +792,7 @@ N.qualified_const_defined?("C::X")        # => true
 As the last example implies, the second argument defaults to true,
 as in `const_defined?`.
 
-For coherence with the builtin methods only relative paths are accepted.
+For coherence with the built-in methods only relative paths are accepted.
 Absolute qualified constant names like `::Math::PI` raise `NameError`.
 
 NOTE: Defined in `active_support/core_ext/module/qualified_const.rb`.
diff --git a/guides/source/configuring.md b/guides/source/configuring.md
index 805f4bb81f..ae382fc54d 100644
--- a/guides/source/configuring.md
+++ b/guides/source/configuring.md
@@ -56,7 +56,7 @@ These configuration methods are to be called on a `Rails::Railtie` object, such
     end
     ```
 
-* `config.asset_host` sets the host for the assets. Useful when CDNs are used for hosting assets, or when you want to work around the concurrency constraints builtin in browsers using different domain aliases. Shorter version of `config.action_controller.asset_host`.
+* `config.asset_host` sets the host for the assets. Useful when CDNs are used for hosting assets, or when you want to work around the concurrency constraints built-in in browsers using different domain aliases. Shorter version of `config.action_controller.asset_host`.
 
 * `config.autoload_once_paths` accepts an array of paths from which Rails will autoload constants that won't be wiped per request. Relevant if `config.cache_classes` is false, which is the case in development mode by default. Otherwise, all autoloading happens only once. All elements of this array must also be in `autoload_paths`. Default is an empty array.
 
diff --git a/guides/source/form_helpers.md b/guides/source/form_helpers.md
index 205e0f6b62..019e7d4cf5 100644
--- a/guides/source/form_helpers.md
+++ b/guides/source/form_helpers.md
@@ -1008,4 +1008,4 @@ As a convenience you can instead pass the symbol `:all_blank` which will create
 
 ### Adding Fields on the Fly
 
-Rather than rendering multiple sets of fields ahead of time you may wish to add them only when a user clicks on an 'Add new address' button. Rails does not provide any builtin support for this. When generating new sets of fields you must ensure the key of the associated array is unique - the current JavaScript date (milliseconds after the epoch) is a common choice.
+Rather than rendering multiple sets of fields ahead of time you may wish to add them only when a user clicks on an 'Add new address' button. Rails does not provide any built-in support for this. When generating new sets of fields you must ensure the key of the associated array is unique - the current JavaScript date (milliseconds after the epoch) is a common choice.