Fix heading levels in Reference Manual

src/docs/asciidoc/data-access-appendix.adoc

@@ -19,13 +19,12 @@ The `tx` tags deal with configuring all of those beans in Spring's comprehensive
 for transactions. These tags are covered in the chapter entitled
 <<data-access.adoc#transaction,Transaction Management>>.
 
-TIP: We strongly encourag you to look at the `'spring-tx.xsd'` file that ships with the
+TIP: We strongly encourage you to look at the `'spring-tx.xsd'` file that ships with the
 Spring distribution. This file contains the XML Schema for Spring's transaction
 configuration and covers all of the various elements in the `tx` namespace, including
-attribute defaults and similar information. This file is documented inline, and, thus, the
-information is not repeated here in the interests of adhering to the DRY (Don't Repeat
-Yourself) principle.
-====
+attribute defaults and similar information. This file is documented inline, and, thus,
+the information is not repeated here in the interests of adhering to the DRY (Don't
+Repeat Yourself) principle.
 
 In the interest of completeness, to use the elements in the `tx` schema, you need to have
 the following preamble at the top of your Spring XML configuration file. The text in the
@@ -51,10 +50,11 @@ are available to you:
 <2> Specify the location (with other schema locations).
 ====
 
-NOTE: Often, when you use the elements in the `tx` namespace, you are also using the elements from the
-`aop` namespace (since the declarative transaction support in Spring is implemented
-by using AOP). The preceding XML snippet contains the relevant lines needed to reference the
-`aop` schema so that the elements in the `aop` namespace are available to you.
+NOTE: Often, when you use the elements in the `tx` namespace, you are also using the
+elements from the `aop` namespace (since the declarative transaction support in Spring is
+implemented by using AOP). The preceding XML snippet contains the relevant lines needed
+to reference the `aop` schema so that the elements in the `aop` namespace are available
+to you.
 
 
 
@@ -63,12 +63,12 @@ by using AOP). The preceding XML snippet contains the relevant lines needed to r
 
 The `jdbc` elements let you quickly configure an embedded database or initialize an
 existing data source. These elements are documented in
-<<data-access.adoc#jdbc-embedded-database-support,Embedded Database Support>>
-and <<data-access.adoc#jdbc-initializing-datasource,Initializing a DataSource>>, respectively.
+<<data-access.adoc#jdbc-embedded-database-support,Embedded Database Support>> and
+<<data-access.adoc#jdbc-initializing-datasource,Initializing a DataSource>>, respectively.
 
-To use the elements in the `jdbc` schema, you need to have the following preamble at the top
-of your Spring XML configuration file. The text in the following snippet references the
-correct schema so that the elements in the `jdbc` namespace are available to you:
+To use the elements in the `jdbc` schema, you need to have the following preamble at the
+top of your Spring XML configuration file. The text in the following snippet references
+the correct schema so that the elements in the `jdbc` namespace are available to you:
 
 ====
 [source,xml,indent=0]

src/docs/asciidoc/data-access.adoc

@@ -2321,7 +2321,7 @@ tedious API.
 
 
 [[jdbc-choose-style]]
-==== Choosing an Approach for JDBC Database Access
+=== Choosing an Approach for JDBC Database Access
 
 You can choose among several approaches to form the basis for your JDBC database access.
 In addition to three flavors of `JdbcTemplate`, a new `SimpleJdbcInsert` and
@@ -2351,7 +2351,7 @@ advanced features require a JDBC 3.0 driver.
 
 
 [[jdbc-packages]]
-==== Package Hierarchy
+=== Package Hierarchy
 
 The Spring Framework's JDBC abstraction framework consists of four different packages:
 
@@ -2389,7 +2389,7 @@ exceptions be propagated to the caller. See <<jdbc-SQLExceptionTranslator>>.
 [[jdbc-core]]
 === Using the JDBC Core Classes to Control Basic JDBC Processing and Error Handling
 
-This section covers how to use the JDBC core classes to cotrol basic JDBC processing,
+This section covers how to use the JDBC core classes to control basic JDBC processing,
 including error handling. It includes the following topics:
 
 * <<jdbc-JdbcTemplate>>

src/docs/asciidoc/web/webflux.adoc

@@ -18,7 +18,7 @@ for example, Spring MVC controllers with the reactive `WebClient`.
 
 
 [[webflux-new-framework]]
-=== Motivation
+== Motivation
 
 Why was Spring WebFlux created?
 
@@ -41,7 +41,7 @@ WebFlux to offer functional web endpoints alongside annotated controllers.
 
 
 [[webflux-why-reactive]]
-=== Define "`Reactive`"
+== Define "`Reactive`"
 
 We touched on "`non-blocking`" and "`functional`" but what does reactive mean?