From 3a0d9325a6df4c2fa6e8ce8cc39e6c067890a7fe Mon Sep 17 00:00:00 2001
From: M Bernt <m.bernt@ufz.de>
Date: Sun, 10 Nov 2019 22:16:00 +0100
Subject: [PATCH] grouping: strip newlines

fixes https://github.com/galaxyproject/galaxy/issues/8383

more generally: if grouping is done on the last column then the newline
was retained and contained in the output.
---
 tools/stats/grouping.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/tools/stats/grouping.py b/tools/stats/grouping.py
index 87bfcb89436..eeb2b79b079 100644
--- a/tools/stats/grouping.py
+++ b/tools/stats/grouping.py
@@ -124,7 +124,9 @@ def main():
             item = line.split("\t")[group_col]
         except IndexError:
             stop_err("The following line didn't have %s columns: %s" % (group_col + 1, line))
-
+        # in case of grouping by the last column the newline character needs to be removed
+        # removal of other white spaces seems also useful
+        item = item.strip()
         if ignorecase == 1:
             return item.lower()
         return item