Fix backticks

doc/articles/troubleshooting.md

@@ -331,9 +331,9 @@ for everyone.
 
 ## Composer hangs with SSH ControlMaster
 
-When you try to install packages from a Git repository and you use the ```ControlMaster```
-setting for you SSH connection  Composer might just hang endlessly and you see a ```sh```
-process in the ```defunct``` state in your process list
+When you try to install packages from a Git repository and you use the `ControlMaster`
+setting for you SSH connection  Composer might just hang endlessly and you see a `sh`
+process in the `defunct` state in your process list
 
 The reason for this is a SSH Bug: https://bugzilla.mindrot.org/show_bug.cgi?id=1988