Rename files by style guide and change query metadata

python/ql/src/Statements/ReturnOrYieldOutsideFunction.py

@@ -1,8 +1,8 @@
-# invalid class with return outside of a function
+# invalid class with return outside a function
 class InvalidClass1(object):
     if [1, 2, 3]:
         return "Exists"
 
-# invalid statement with yield outside of a function
+# invalid statement with yield outside a function
 for i in [1, 2, 3]:
     yield i

python/ql/src/Statements/ReturnOrYieldOutsideFunction.qhelp

@@ -18,7 +18,7 @@ Consequently, it is not possible to suggest a general fix.</p>
 <p>In this example, a <code>return</code> statement is used outside a class method in a class and
 a <code>yield</code> statement is used outside a function in a scope of a module which would result
 in a <code>SyntaxError</code> when running this code.</p>
-<sample src="ReturnOrYieldOutsideOfFunction.py" />
+<sample src="ReturnOrYieldOutsideFunction.py" />
 </example>
 
 <references>

python/ql/src/Statements/ReturnOrYieldOutsideFunction.ql

@@ -1,13 +1,13 @@
 /**
- * @name Using 'return' or 'yield' outside a function causes a 'SyntaxError' at runtime
- * @description Statements 'return' and 'yield' should be used only within a function.
+ * @name Use of 'return' or 'yield' outside a function
+ * @description Using 'return' or 'yield' outside a function causes a 'SyntaxError' at runtime.
  * @kind problem
  * @tags reliability
  *       correctness
  * @problem.severity error
  * @sub-severity low
- * @precision very-high
- * @id py/return-or-yield-outside-of-function
+ * @precision medium
+ * @id py/return-or-yield-outside-function
  */
 
 import python
@@ -22,4 +22,4 @@ where
     or
     node instanceof YieldFrom and kind = "yield from"
   )
-select node, "'" + kind + "' is used outside of a function."
+select node, "'" + kind + "' is used outside a function."