Refactored syntax highlighting shortcodes into markdown

content/docs/gentoo/upgrades.md

@@ -9,24 +9,24 @@ tags:
 ## Introduction
 
 Here is my go to set of commands when I upgrade a gentoo box :
-{{< highlight sh >}}
+```sh
 emerge-webrsync
 eselect news read
-{{< /highlight >}}
+```
 
 The news have to be reviewed carefully and if I cannot act on it immediately I copy paste the relevant bits to my todolist.
 
 ## The upgrade process
 
 I run the upgrade process in steps, the first one asking you to validate the upgrade path. You will also be prompted to validate before cleaning :
-{{< highlight sh >}}
+```sh
 emerge -qAavutDN world --verbose-conflicts --keep-going --with-bdeps=y && emerge --depclean -a && revdep-rebuild -i -- -q --keep-going; eclean --deep distfiles && eclean --deep packages && date
-{{< /highlight >}}
+```
 
 After all this completes it is time to evaluate configuration changes :
-{{< highlight sh >}}
+```sh
 etc-update
-{{< /highlight >}}
+```
 
 If a new kernel has been emerged, have a look at [the specific process for that]({{< ref "kernel_upgrades" >}}).