Improve highlighting of some code blocks. (GH-6401)

1 files changed, 6 insertions, 2 deletions

diff --git a/Doc/howto/instrumentation.rst b/Doc/howto/instrumentation.rst
index b9c51a4..b63c43c 100644
--- a/Doc/howto/instrumentation.rst
+++ b/Doc/howto/instrumentation.rst
@@ -254,11 +254,15 @@ and the remainder indicates the call/return hierarchy as the script executes.
 
 For a `--enable-shared` build of CPython, the markers are contained within the
 libpython shared library, and the probe's dotted path needs to reflect this. For
-example, this line from the above example::
+example, this line from the above example:
+
+.. code-block:: none
 
    probe process("python").mark("function__entry") {
 
-should instead read::
+should instead read:
+
+.. code-block:: none
 
    probe process("python").library("libpython3.6dm.so.1.0").mark("function__entry") {