minor #3829 [Components] consistent headlines (xabbuh)

This PR was merged into the 2.3 branch.

Discussion
----------

[Components] consistent headlines

| Q             | A
| ------------- | ---
| Doc fix?      | yes
| New docs?     | no
| Applies to    | all
| Fixed tickets |

This is a follow-up of #3765.

Commits
-------

0586ec4 [Components] consistent headlines

components/config/caching.rst

@@ -1,7 +1,7 @@
 .. index::
    single: Config; Caching based on resources
 
-Caching based on resources
+Caching Based on Resources
 ==========================
 
 When all configuration resources are loaded, you may want to process the configuration

components/config/definition.rst

@@ -1,10 +1,10 @@
 .. index::
    single: Config; Defining and processing configuration values
 
-Defining and processing configuration values
+Defining and Processing Configuration Values
 ============================================
 
-Validating configuration values
+Validating Configuration Values
 -------------------------------
 
 After loading configuration values from all kinds of resources, the values
@@ -38,7 +38,7 @@ they are when first encountered. Also, some keys are only available when
 another key has a specific value (in the sample configuration above: the
 ``memory`` key only makes sense when the ``driver`` is ``sqlite``).
 
-Defining a hierarchy of configuration values using the TreeBuilder
+Defining a Hierarchy of Configuration Values Using the TreeBuilder
 ------------------------------------------------------------------
 
 All the rules concerning configuration values can be defined using the
@@ -66,10 +66,10 @@ should be returned from a custom ``Configuration`` class which implements the
         }
     }
 
-Adding node definitions to the tree
+Adding Node Definitions to the Tree
 -----------------------------------
 
-Variable nodes
+Variable Nodes
 ~~~~~~~~~~~~~~
 
 A tree contains node definitions which can be laid out in a semantic way.
@@ -91,7 +91,7 @@ The root node itself is an array node, and has children, like the boolean
 node ``auto_connect`` and the scalar node ``default_connection``. In general:
 after defining a node, a call to ``end()`` takes you one step up in the hierarchy.
 
-Node type
+Node Type
 ~~~~~~~~~
 
 It is possible to validate the type of a provided value by using the appropriate
@@ -108,7 +108,7 @@ node definition. Node type are available for:
 and are created with ``node($name, $type)`` or their associated shortcut
 ``xxxxNode($name)`` method.
 
-Numeric node constraints
+Numeric Node Constraints
 ~~~~~~~~~~~~~~~~~~~~~~~~
 
 .. versionadded:: 2.2
@@ -133,7 +133,7 @@ allowing to validate the value::
         ->end()
     ;
 
-Enum nodes
+Enum Nodes
 ~~~~~~~~~~
 
 .. versionadded:: 2.1
@@ -152,7 +152,7 @@ values::
 
 This will restrict the ``gender`` option to be either ``male`` or ``female``.
 
-Array nodes
+Array Nodes
 ~~~~~~~~~~~
 
 It is possible to add a deeper level to the hierarchy, by adding an array
@@ -193,7 +193,7 @@ inside the current node. According to the prototype definition in the example
 above, it is possible to have multiple connection arrays (containing a ``driver``,
 ``host``, etc.).
 
-Array node options
+Array Node Options
 ~~~~~~~~~~~~~~~~~~
 
 Before defining the children of an array node, you can provide options like:
@@ -236,7 +236,7 @@ In XML, each ``parameters`` node would have a ``name`` attribute (along with
 the final array. The ``useAttributeAsKey`` is useful for normalizing how
 arrays are specified between different formats like XML and YAML.
 
-Default and required values
+Default and required Values
 ---------------------------
 
 For all node types, it is possible to define default values and replacement
@@ -316,7 +316,7 @@ you can take advantage of the shortcut
 The ``canBeDisabled`` method looks about the same except that the section
 would be enabled by default.
 
-Merging options
+Merging Options
 ---------------
 
 Extra options concerning the merge process may be provided. For arrays:
@@ -330,7 +330,7 @@ For all nodes:
 ``cannotBeOverwritten()``
     don’t let other configuration arrays overwrite an existing value for this node
 
-Appending sections
+Appending Sections
 ------------------
 
 If you have a complex configuration to validate then the tree can grow to
@@ -502,7 +502,7 @@ By changing a string value into an associative array with ``name`` as the key::
         ->end()
     ;
 
-Validation rules
+Validation Rules
 ----------------
 
 More advanced validation rules can be provided using the
@@ -548,7 +548,7 @@ Usually, "then" is a closure. Its return value will be used as a new value
 for the node, instead
 of the node's original value.
 
-Processing configuration values
+Processing Configuration Values
 -------------------------------
 
 The :class:`Symfony\\Component\\Config\\Definition\\Processor` uses the tree

components/config/resources.rst

@@ -1,10 +1,10 @@
 .. index::
    single: Config; Loading resources
 
-Loading resources
+Loading Resources
 =================
 
-Locating resources
+Locating Resources
 ------------------
 
 Loading the configuration normally starts with a search for resources – in
@@ -24,7 +24,7 @@ look in this directory first. The third argument indicates whether or not the
 locator should return the first file it has found, or an array containing
 all matches.
 
-Resource loaders
+Resource Loaders
 ----------------
 
 For each type of resource (YAML, XML, annotation, etc.) a loader must be defined.
@@ -57,7 +57,7 @@ class, which allows for recursively importing other resources::
         }
     }
 
-Finding the right loader
+Finding the right Loader
 ------------------------
 
 The :class:`Symfony\\Component\\Config\\Loader\\LoaderResolver` receives as

components/console/events.rst

@@ -51,7 +51,7 @@ dispatched. Listeners receive a
         $application = $command->getApplication();
     });
 
-The ``ConsoleEvents::TERMINATE`` event
+The ``ConsoleEvents::TERMINATE`` Event
 --------------------------------------
 
 **Typical Purposes**: To perform some cleanup actions after the command has
@@ -89,7 +89,7 @@ Listeners receive a
     It is then dispatched just before the ``ConsoleEvents::EXCEPTION`` event.
     The exit code received in this case is the exception code.
 
-The ``ConsoleEvents::EXCEPTION`` event
+The ``ConsoleEvents::EXCEPTION`` Event
 --------------------------------------
 
 **Typical Purposes**: Handle exceptions thrown during the execution of a

components/console/helpers/dialoghelper.rst

@@ -16,7 +16,7 @@ All the methods inside the Dialog Helper have an
 argument, the question as the second argument and the default value as the last
 argument.
 
-Asking the User for confirmation
+Asking the User for Confirmation
 --------------------------------
 
 Suppose you want to confirm an action before actually executing it. Add
@@ -172,7 +172,7 @@ You can also ask and validate a hidden response::
 If you want to allow the response to be visible if it cannot be hidden for
 some reason, pass true as the fifth argument.
 
-Let the user choose from a list of Answers
+Let the User Choose from a List of Answers
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
 .. versionadded:: 2.2
@@ -244,7 +244,7 @@ this set the seventh argument to ``true``::
 Now, when the user enters ``1,2``, the result will be:
 ``You have just selected: blue, yellow``.
 
-Testing a Command which expects input
+Testing a Command which Expects Input
 -------------------------------------
 
 If you want to write a unit test for a command which expects some kind of input

components/console/introduction.rst

@@ -437,7 +437,7 @@ method::
     You can also test a whole console application by using
     :class:`Symfony\\Component\\Console\\Tester\\ApplicationTester`.
 
-Calling an existing Command
+Calling an Existing Command
 ---------------------------
 
 If a command depends on another one being run before it, instead of asking the

components/console/single_command_tool.rst

@@ -1,7 +1,7 @@
 .. index::
    single: Console; Single command application
 
-Building a Single Command Application
+Building a single Command Application
 =====================================
 
 When building a command line tool, you may not need to provide several commands.

components/css_selector.rst

@@ -18,8 +18,8 @@ You can install the component in 2 different ways:
 Usage
 -----
 
-Why use CSS selectors?
-~~~~~~~~~~~~~~~~~~~~~~
+Why to Use CSS selectors?
+~~~~~~~~~~~~~~~~~~~~~~~~~
 
 When you're parsing an HTML or an XML document, by far the most powerful
 method is XPath.
@@ -41,7 +41,7 @@ be converted to an XPath equivalent. This XPath expression can then be used
 with other functions and classes that use XPath to find elements in a
 document.
 
-The CssSelector component
+The CssSelector Component
 ~~~~~~~~~~~~~~~~~~~~~~~~~
 
 The component's only goal is to convert CSS selectors to their XPath
@@ -66,7 +66,7 @@ You can use this expression with, for instance, :phpclass:`DOMXPath` or
     uses the CssSelector component to find elements based on a CSS selector
     string. See the :doc:`/components/dom_crawler` for more details.
 
-Limitations of the CssSelector component
+Limitations of the CssSelector Component
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
 Not all CSS selectors can be converted to XPath equivalents.

components/dependency_injection/advanced.rst

@@ -156,7 +156,7 @@ service by asking for the ``bar`` service like this::
            bar: "@foo"
 
 
-Requiring files
+Requiring Files
 ---------------
 
 There might be use cases when you need to include another file just before

components/dependency_injection/compilation.rst

@@ -273,7 +273,7 @@ but also load a secondary one only if a certain parameter is set::
 
 .. _components-dependency-injection-compiler-passes:
 
-Prepending Configuration passed to the Extension
+Prepending Configuration Passed to the Extension
 ------------------------------------------------
 
 .. versionadded:: 2.2

components/dependency_injection/definitions.rst

@@ -33,10 +33,10 @@ it to the container using::
 
     $container->setDefinition($id, $definition);
 
-Working with a definition
+Working with a Definition
 -------------------------
 
-Creating a new definition
+Creating a new Definition
 ~~~~~~~~~~~~~~~~~~~~~~~~~
 
 If you need to create a new definition rather than manipulate one retrieved

components/dependency_injection/introduction.rst

@@ -160,7 +160,7 @@ like this::
 
     $newsletterManager = $container->get('newsletter_manager');
 
-Avoiding Your Code Becoming Dependent on the Container
+Avoiding your Code Becoming Dependent on the Container
 ------------------------------------------------------
 
 Whilst you can retrieve services from the container directly it is best
@@ -175,7 +175,7 @@ should be as few times as possible at the entry point to your application.
 
 .. _components-dependency-injection-loading-config:
 
-Setting Up the Container with Configuration Files
+Setting up the Container with Configuration Files
 -------------------------------------------------
 
 As well as setting up the services using PHP as above you can also use

components/dependency_injection/lazy_services.rst

@@ -7,7 +7,7 @@ Lazy Services
 .. versionadded:: 2.3
    Lazy services were added in Symfony 2.3.
 
-Why Lazy Services?
+Why lazy Services?
 ------------------
 
 In some cases, you may want to inject a service that is a bit heavy to instantiate,
@@ -36,13 +36,13 @@ the `ProxyManager bridge`_:
 
     If you're using the full-stack framework, the proxy manager bridge is already
     included but the actual proxy manager needs to be included. Therefore add
-    
+
     .. code-block:: json
 
         "require": {
             "ocramius/proxy-manager": "0.4.*"
         }
-    
+
     to your ``composer.json``. Afterwards compile your container and check
     to make sure that you get a proxy for your lazy services.
 
@@ -79,13 +79,13 @@ the same signature of the class representing the service. You can also inject
 the service just like normal into other services. The object that's actually
 injected will be the proxy.
 
-To check if your proxy works you can simply check the interface of the 
+To check if your proxy works you can simply check the interface of the
 received object.
 
 .. code-block:: php
 
     var_dump(class_implements($service));
-    
+
 If the class implements the ``ProxyManager\Proxy\LazyLoadingInterface`` your
 lazy loaded services are working.
 

components/dependency_injection/parentservices.rst

@@ -1,7 +1,7 @@
 .. index::
    single: DependencyInjection; Parent services
 
-Managing Common Dependencies with Parent Services
+Managing common Dependencies with parent Services
 =================================================
 
 As you add more functionality to your application, you may well start to have
@@ -299,7 +299,7 @@ would cause an exception to be raised for a non-abstract service.
     You can just extract common parts of similar service definitions into
     a parent service without also extending a parent class in PHP.
 
-Overriding Parent Dependencies
+Overriding parent Dependencies
 ------------------------------
 
 There may be times where you want to override what class is passed in for

components/dependency_injection/tags.rst

@@ -64,7 +64,7 @@ Then, define the chain as a service:
 
         $container->setDefinition('acme_mailer.transport_chain', new Definition('%acme_mailer.transport_chain.class%'));
 
-Define Services with a Custom Tag
+Define Services with a custom Tag
 ---------------------------------
 
 Now you might want several of the ``\Swift_Transport`` classes to be instantiated
@@ -172,7 +172,7 @@ run when the container is compiled::
     stack framework. See :doc:`/cookbook/service_container/compiler_passes`
     for more details.
 
-Adding additional attributes on Tags
+Adding additional Attributes on Tags
 ------------------------------------
 
 Sometimes you need additional information about each service that's tagged with your tag.