Rust: improve TupleStructPat.toString

Author: Paolo Tranquilli

rust/ql/.generated.list

@@ -1,4 +1,3 @@
-// generated by codegen, remove this comment if you wish to edit this file
 /**
  * This module provides a hand-modifiable wrapper around the generated class `TupleStructPat`.
  *
@@ -12,6 +11,7 @@ private import codeql.rust.elements.internal.generated.TupleStructPat
  * be referenced directly.
  */
 module Impl {
+  // the following QLdoc is generated: if you need to edit it, do it in the schema file
   /**
    * A tuple struct pattern. For example:
    * ```rust
@@ -22,5 +22,7 @@ module Impl {
    * };
    * ```
    */
-  class TupleStructPat extends Generated::TupleStructPat { }
+  class TupleStructPat extends Generated::TupleStructPat {
+    override string toString() { result = this.getPath().toAbbreviatedString() + "(...)" }
+  }
 }