minor #5044 Minor improvement in the node types explanation (javiereguiluz)

This PR was merged into the 2.3 branch.

Discussion
----------

Minor improvement in the node types explanation

| Q             | A
| ------------- | ---
| Doc fix?      | no
| New docs?     | yes
| Applies to    | 2.3+
| Fixed tickets | -

Commits
-------

987f5a5 "enum" is similar to "scalar", not "array"
96c423a Moved the admonition about the INI loader to the loaders section
c774b8a Improved a bit the information about dumping config
daff271 Minor improvement in the node types explanation

Author: weaverryan

components/config/definition.rst

@@ -95,13 +95,13 @@ Node Type
 ~~~~~~~~~
 
 It is possible to validate the type of a provided value by using the appropriate
-node definition. Node type are available for:
+node definition. Node types are available for:
 
-* scalar
+* scalar (generic type that includes booleans, strings, integers, floats and ``null``)
 * boolean
 * integer (new in 2.2)
 * float (new in 2.2)
-* enum (new in 2.1)
+* enum (new in 2.1) (similar to scalar, but it only allows a finite set of values)
 * array
 * variable (no validation)
 
@@ -294,7 +294,8 @@ All options can be documented using the
 :method:`Symfony\\Component\\Config\\Definition\\Builder\\NodeDefinition::info`
 method.
 
-The info will be printed as a comment when dumping the configuration tree.
+The info will be printed as a comment when dumping the configuration tree with
+the ``config:dump`` command.
 
 Optional Sections
 -----------------

components/config/introduction.rst

@@ -9,13 +9,6 @@ The Config Component
     combine, autofill and validate configuration values of any kind, whatever
     their source may be (YAML, XML, INI files, or for instance a database).
 
-.. caution::
-
-    The ``IniFileLoader`` parses the file contents using the
-    :phpfunction:`parse_ini_file` function, therefore, you can only set
-    parameters to string values. To set parameters to other data types
-    (e.g. boolean, integer, etc), the other loaders are recommended.
-
 Installation
 ------------
 

components/config/resources.rst

@@ -4,6 +4,13 @@
 Loading Resources
 =================
 
+.. caution::
+
+    The ``IniFileLoader`` parses the file contents using the
+    :phpfunction:`parse_ini_file` function. Therefore, you can only set
+    parameters to string values. To set parameters to other data types
+    (e.g. boolean, integer, etc), the other loaders are recommended.
+
 Locating Resources
 ------------------