Improved VDBE comment on the OP_Param opcode.  No substantial changes.

FossilOrigin-Name: 368c14da868a843767344f6cc17c499fddd83244c0510337ed9a918e64ee2413
diff --git a/src/expr.c b/src/expr.c
index 6513c5e..03fad6c 100644
--- a/src/expr.c
+++ b/src/expr.c
@@ -4049,10 +4049,9 @@
       assert( p1>=0 && p1<(pTab->nCol*2+2) );
 
       sqlite3VdbeAddOp2(v, OP_Param, p1, target);
-      VdbeComment((v, "%s.%s -> $%d",
+      VdbeComment((v, "r[%d]=%s.%s", target,
         (pExpr->iTable ? "new" : "old"),
-        (pExpr->iColumn<0 ? "rowid" : pExpr->pTab->aCol[pExpr->iColumn].zName),
-        target
+        (pExpr->iColumn<0 ? "rowid" : pExpr->pTab->aCol[pExpr->iColumn].zName)
       ));
 
 #ifndef SQLITE_OMIT_FLOATING_POINT