Merge branch 'da/mergetool-winmerge' Hotfix for an earlier change already in 'master' that broke the default tool selection for mergetool. * da/mergetool-winmerge: mergetool-lib: fix default tool selection

diff --git a/git-mergetool--lib.sh b/git-mergetool--lib.sh
index 14b039d..54ac8e4 100644
--- a/git-mergetool--lib.sh
+++ b/git-mergetool--lib.sh

@@ -305,6 +305,7 @@
 	EOF
 
 	# Loop over each candidate and stop when a valid merge tool is found.
+	IFS=' '
 	for tool in $tools
 	do
 		is_available "$tool" && echo "$tool" && return 0