tracks/lua/exercises/matrix/README.md in trackler-2.2.1.47 vs tracks/lua/exercises/matrix/README.md in trackler-2.2.1.48

@@ -3,16 +3,18 @@
 Given a string representing a matrix of numbers, return the rows and columns of
 that matrix.
 
 So given a string with embedded newlines like:
 
-> 9 8 7  
-> 5 3 2  
-> 6 6 7  
+```text
+9 8 7
+5 3 2
+6 6 7
+```
 
 representing this matrix:
 
-```plain
+```text
     0  1  2
   |---------
 0 | 9  8  7
 1 | 5  3  2
 2 | 6  6  7