Merge branch 'master' into fix/keywords

example/mu/example.dtx

@@ -812,7 +812,7 @@ fac() {
 }
 ``````````````
 
-~~~~~~ Ruby
+~~~~~~ ruby
 # Here's a way to empty an array.
 joe = [ 'eggs.', 'some', 'break', 'to', 'Have' ]
 print(joe.pop, " ") while joe.size > 0