Clarify comment

Author: novemberborn

lib/worker/subprocess.js

@@ -102,7 +102,7 @@ ipc.options.then(async options => {
 		return runner;
 	};
 
-	// Store value in case to prevent required modules from modifying it.
+	// Store value to prevent required modules from modifying it.
 	const testPath = options.file;
 
 	// Install basic source map support.