Ruby: fix qhelp

ruby/ql/src/queries/security/cwe-1333/RegExpInjection.qhelp

@@ -26,31 +26,12 @@ special meaning.
 The following examples construct regular expressions from an HTTP request
 parameter without sanitizing it first:
 </p>
-<sample language="ruby">
-class UsersController < ActionController::Base
-  def first_example
-    # BAD: Unsanitized user input is used to construct a regular expression
-    regex = /#{ params[:key] }/
-  end
-
-  def second_example
-    # BAD: Unsanitized user input is used to construct a regular expression
-    regex = Regexp.new(params[:key])
-  end
-end
-</sample>
+<sample src="examples/regexp_injection_bad.rb" />
 <p>
 Instead, the request parameter should be sanitized first. This ensures that the
 user cannot insert characters that have special meanings in regular expressions.
 </p>
-<sample language="ruby">
-class UsersController < ActionController::Base
-  def example
-    # GOOD: User input is sanitized before constructing the regular expression
-    regex = Regexp.new(Regex.escape(params[:key]))
-  end
-end
-</sample>
+<sample src="examples/regexp_injection_good.rb" />
 </example>
 
 <references>

ruby/ql/src/queries/security/cwe-1333/examples/regexp_injection_bad.rb

@@ -0,0 +1,11 @@
+class UsersController < ActionController::Base
+  def first_example
+    # BAD: Unsanitized user input is used to construct a regular expression
+    regex = /#{ params[:key] }/
+  end
+
+  def second_example
+    # BAD: Unsanitized user input is used to construct a regular expression
+    regex = Regexp.new(params[:key])
+  end
+end

ruby/ql/src/queries/security/cwe-1333/examples/regexp_injection_good.rb

@@ -0,0 +1,6 @@
+class UsersController < ActionController::Base
+  def example
+    # GOOD: User input is sanitized before constructing the regular expression
+    regex = Regexp.new(Regex.escape(params[:key]))
+  end
+end