xdiff/xprepare: use a smaller sample size for histogram diff

diff --git a/t/t4029-diff-trailing-space.sh b/t/t4029-diff-trailing-space.sh
index 9ddbbcde57489e266e2f229314ebac5dbfeb3be6..3ccc237a8d4443bfc8763fbb9cb51033f846b0e8 100755 (executable)
--- a/t/t4029-diff-trailing-space.sh
+++ b/t/t4029-diff-trailing-space.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/sh
 #
 # Copyright (c) Jim Meyering
 #