Updated Debugging segfaults and hard to decipher pybind11 bugs (markdown)

Debugging-segfaults-and-hard-to-decipher-pybind11-bugs.md

@@ -47,7 +47,7 @@ def traced(func, ignoredirs=None):
 
 Usage of this could look like the following:
 
-```sh
+```py
 import debug
 import my_crazy_cool_module  # Say this has bindings buried 3 levels deep.
 
@@ -69,13 +69,13 @@ The easiest way to do this is to use a debug build w/ a debug Python interpreter
 
 Here's an example workflow of debugging a specific unittest on CPython 3.8 on Ubuntu 18.04; this assumes the following packages are installed:
 
-```
+```sh
 sudo apt install cmake build-essential python3.8-dev python3.8-venv python3.8-dbg
 ```
 
 Then here's an example of running a unittest with GDB:
 
-```
+```sh
 cd pybind11
 
 python3.8-dbg -m venv ./venv