Python: Clarify getArg is about positional arguments

Author: RasmusWL

python/ql/lib/semmle/python/Flow.qll

@@ -363,7 +363,7 @@ class CallNode extends ControlFlowNode {
     )
   }
 
-  /** Gets the flow node corresponding to the nth argument of the call corresponding to this flow node */
+  /** Gets the flow node corresponding to the n'th positional argument of the call corresponding to this flow node */
   ControlFlowNode getArg(int n) {
     exists(Call c |
       this.getNode() = c and

python/ql/lib/semmle/python/dataflow/new/internal/DataFlowPublic.qll

@@ -211,7 +211,7 @@ class CallCfgNode extends CfgNode, LocalSourceNode {
    */
   Node getFunction() { result.asCfgNode() = node.getFunction() }
 
-  /** Gets the data-flow node corresponding to the i'th argument of the call corresponding to this data-flow node */
+  /** Gets the data-flow node corresponding to the i'th positional argument of the call corresponding to this data-flow node */
   Node getArg(int i) { result.asCfgNode() = node.getArg(i) }
 
   /** Gets the data-flow node corresponding to the named argument of the call corresponding to this data-flow node */