From 426a4cdca901606d3ffd716c063e394cec964f9f Mon Sep 17 00:00:00 2001
From: Daniel Hahler <git@thequod.de>
Date: Mon, 18 Nov 2019 01:08:25 +0100
Subject: [PATCH] _idval: remove trailing newline from exception

---
 src/_pytest/python.py | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/src/_pytest/python.py b/src/_pytest/python.py
index 30853de94..e6de5f3c6 100644
--- a/src/_pytest/python.py
+++ b/src/_pytest/python.py
@@ -1156,8 +1156,7 @@ def _idval(val, argname, idx, idfn, item, config):
             if generated_id is not None:
                 val = generated_id
         except Exception as e:
-            # See issue https://github.com/pytest-dev/pytest/issues/2169
-            msg = "{}: error raised while trying to determine id of parameter '{}' at position {}\n"
+            msg = "{}: error raised while trying to determine id of parameter '{}' at position {}"
             msg = msg.format(item.nodeid, argname, idx)
             raise ValueError(msg) from e
     elif config: