Documentation/admin-guide: use code-block with proper language

Now that we don't have automatic syntax highlighting, use the code-block
directive with the explicitly selected language, where appropriate.
Signed-off-by: NJani Nikula <jani.nikula@intel.com>

Documentation/admin-guide/java.rst

@@ -66,7 +66,9 @@ other program after you have done the following:
    Both the javawrapper shellscript and the javaclassname program
    were supplied by Colin J. Watson <cjw44@cam.ac.uk>.
 
-Javawrapper shell script::
+Javawrapper shell script:
+
+.. code-block:: sh
 
   #!/bin/bash
   # /usr/local/bin/javawrapper - the wrapper for binfmt_misc/java
@@ -155,7 +157,9 @@ Javawrapper shell script::
   shift
   /usr/bin/java $FQCLASS "$@"
 
-javaclassname.c::
+javaclassname.c:
+
+.. code-block:: c
 
   /* javaclassname.c
    *
@@ -378,7 +382,9 @@ added to your CLASSPATH during execution.
 
 
 To test your new setup, enter in the following simple Java app, and name
-it "HelloWorld.java"::
+it "HelloWorld.java":
+
+.. code-block:: java
 
 	class HelloWorld {
 		public static void main(String args[]) {

Documentation/admin-guide/mono.rst

@@ -31,7 +31,9 @@ other program after you have done the following:
    more about the configuration process.
 
 3) Add the following entries to ``/etc/rc.local`` or similar script
-   to be run at system startup::
+   to be run at system startup:
+
+   .. code-block:: sh
 
     # Insert BINFMT_MISC module into the kernel
     if [ ! -e /proc/sys/fs/binfmt_misc/register ]; then

Documentation/admin-guide/ramoops.rst

@@ -78,7 +78,9 @@ Setting the ramoops parameters can be done in several different manners:
 	};
 
  C. Use a platform device and set the platform data. The parameters can then
- be set through that platform data. An example of doing that is::
+ be set through that platform data. An example of doing that is:
+
+ .. code-block:: c
 
   #include <linux/pstore_ram.h>
   [...]