use set literals instead of big disjunctions

python/ql/src/Statements/ModificationOfLocals.ql

@@ -22,10 +22,7 @@ predicate modification_of_locals(ControlFlowNode f) {
     attr = f.(CallNode).getFunction() and
     originIsLocals(attr.getObject(mname))
   |
-    mname = "pop" or
-    mname = "popitem" or
-    mname = "update" or
-    mname = "clear"
+    mname in ["pop", "popitem", "update", "clear"]
   )
 }