cue schema: fix trailing whitespace

support/schemas/generators.cue

@@ -20,7 +20,7 @@ import "strings"
 	_parts: [#path, ...#command_args]
 }
 
-// Test cases and test groups allow configuration of solution, visualiser, and random salt. 
+// Test cases and test groups allow configuration of solution, visualiser, and random salt.
 #config: {
 	// Path to solution starts with slash, such as "/submissions/accepted/foo.py"
 	solution?: #filepath & =~"^/"