Doc fix: use backticks instead of Javadoc code block

Signed-off-by: Thomas Segismont <tsegismont@gmail.com>

src/main/asciidoc/buffers.adoc

@@ -52,14 +52,14 @@ Note that buffers created this way *are empty*. It does not create a buffer fill
 
 There are two ways to write to a buffer: appending, and random access.
 In either case buffers will always expand automatically to encompass the bytes. It's not possible to get
-an {@code IndexOutOfBoundsException} with a buffer.
+an `IndexOutOfBoundsException` with a buffer.
 
 ==== Appending to a Buffer
 
-To append to a buffer, you use the {@code appendXXX} methods.
+To append to a buffer, you use the `appendXXX` methods.
 Append methods exist for appending various different types.
 
-The return value of the {@code appendXXX} methods is the buffer itself, so these can be chained:
+The return value of the `appendXXX` methods is the buffer itself, so these can be chained:
 
 [source,$lang]
 ----
@@ -68,7 +68,7 @@ The return value of the {@code appendXXX} methods is the buffer itself, so these
 
 ==== Random access buffer writes
 
-You can also write into the buffer at a specific index, by using the {@code setXXX} methods.
+You can also write into the buffer at a specific index, by using the `setXXX` methods.
 Set methods exist for various different data types. All the set methods take an index as the first argument - this
 represents the position in the buffer where to start writing the data.
 
@@ -81,7 +81,7 @@ The buffer will always expand as necessary to accommodate the data.
 
 === Reading from a Buffer
 
-Data is read from a buffer using the {@code getXXX} methods. Get methods exist for various datatypes.
+Data is read from a buffer using the `getXXX` methods. Get methods exist for various datatypes.
 The first argument to these methods is an index in the buffer from where to get the data.
 
 [source,$lang]
@@ -91,8 +91,8 @@ The first argument to these methods is an index in the buffer from where to get
 
 === Working with unsigned numbers
 
-Unsigned numbers can be read from or appended/set to a buffer with the {@code getUnsignedXXX},
-{@code appendUnsignedXXX} and {@code setUnsignedXXX} methods. This is useful when implementing a codec for a
+Unsigned numbers can be read from or appended/set to a buffer with the `getUnsignedXXX`,
+`appendUnsignedXXX` and `setUnsignedXXX` methods. This is useful when implementing a codec for a
 network protocol optimized to minimize bandwidth consumption.
 
 In the following example, value 200 is set at specified position with just one byte:

src/main/asciidoc/cli-for-java.adoc

@@ -36,7 +36,7 @@ this converter:
 {@link examples.cli.TypedCLIExamples#example3}
 ----
 
-For booleans, the boolean values are evaluated to {@code true}: `on`, `yes`, `1`, `true`.
+For booleans, the boolean values are evaluated to `true`: `on`, `yes`, `1`, `true`.
 
 If one of your option has an `enum` as type, it computes the set of choices automatically.
 

src/main/asciidoc/cli.adoc

@@ -33,7 +33,7 @@ describe options and arguments:
 As you can see, you can create a new {@link io.vertx.core.cli.CLI} using
 {@link io.vertx.core.cli.CLI#create(java.lang.String)}. The passed string is the name of the CLI. Once created you
 can set the summary and description. The summary is intended to be short (one line), while the description can
-contain more details. Each option and argument are also added on the {@code CLI} object using the
+contain more details. Each option and argument are also added on the `CLI` object using the
 {@link io.vertx.core.cli.CLI#addArgument(io.vertx.core.cli.Argument)} and
 {@link io.vertx.core.cli.CLI#addOption(io.vertx.core.cli.Option)} methods.
 

src/main/asciidoc/http.adoc

@@ -56,7 +56,7 @@ WARNING: most browsers won't support `h2c`, so for serving web sites you should
 When a server accepts an HTTP/2 connection, it sends to the client its {@link io.vertx.core.http.HttpServerOptions#getInitialSettings initial settings}.
 The settings define how the client can use the connection, the default initial settings for a server are:
 
-- {@link io.vertx.core.http.Http2Settings#getMaxConcurrentStreams}: {@code 100} as recommended by the HTTP/2 RFC
+- {@link io.vertx.core.http.Http2Settings#getMaxConcurrentStreams}: `100` as recommended by the HTTP/2 RFC
 - the default HTTP/2 settings values for the others
 
 NOTE: Worker Verticles are not compatible with HTTP/2

src/main/asciidoc/index.adoc

@@ -1081,7 +1081,7 @@ The `start`, `stop` and `list` command are also available from the `vertx` tool.
  * `java-opts` : the Java Virtual Machine options, uses the `JAVA_OPTS` environment variable if not set.
  * `redirect-output` : redirect the spawned process output and error streams to the parent process streams.
 
- If option values contain spaces, don't forget to wrap the value between {@code ""} (double-quotes).
+ If option values contain spaces, don't forget to wrap the value between `""` (double-quotes).
 
  As the `start` command spawns a new process, the java options passed to the JVM are not propagated, so you **must**
  use `java-opts` to configure the JVM (`-X`, `-D`...). If you use the `CLASSPATH` environment variable, be sure it
@@ -1637,13 +1637,13 @@ and {@link io.vertx.core.impl.launcher.VertxCommandLauncher#unregister(java.lang
 
 When you use the {@link io.vertx.core.Launcher} class as main class, it uses the following exit code:
 
-* {@code 0} if the process ends smoothly, or if an uncaught error is thrown
-* {@code 1} for general purpose error
-* {@code 11} if Vert.x cannot be initialized
-* {@code 12} if a spawn process cannot be started, found or stopped. This error code is used by the `start` and
+* `0` if the process ends smoothly, or if an uncaught error is thrown
+* `1` for general purpose error
+* `11` if Vert.x cannot be initialized
+* `12` if a spawn process cannot be started, found or stopped. This error code is used by the `start` and
 `stop` command
-* {@code 14} if the system configuration is not meeting the system requirement (shc as java not found)
-* {@code 15} if the main verticle cannot be deployed
+* `14` if the system configuration is not meeting the system requirement (shc as java not found)
+* `15` if the main verticle cannot be deployed
 
 == Configuring Vert.x cache
 

src/main/asciidoc/override/hostname-resolution.adoc

@@ -63,5 +63,5 @@ list can be provided:
 {@link examples.CoreExamples#configureSearchDomains()}
 ----
 
-When a search domain list is used, the threshold for the number of dots is {@code 1} or loaded from `/etc/resolv.conf`
+When a search domain list is used, the threshold for the number of dots is `1` or loaded from `/etc/resolv.conf`
 on Linux, it can be configured to a specific value with {@link io.vertx.core.dns.AddressResolverOptions#setNdots(int)}.

src/main/asciidoc/override/json.adoc

@@ -44,7 +44,7 @@ The method invocations can be chained because of the fluent API:
 
 ==== Getting values from a JSON object
 
-You get values from a JSON object using the {@code getXXX} methods, for example:
+You get values from a JSON object using the `getXXX` methods, for example:
 
 [source,java]
 ----
@@ -106,7 +106,7 @@ You add entries to a JSON array using the {@link io.vertx.core.json.JsonArray#ad
 
 ==== Getting values from a JSON array
 
-You get values from a JSON array using the {@code getXXX} methods, for example:
+You get values from a JSON array using the `getXXX` methods, for example:
 
 [source,java]
 ----