xread, xwrite: limit size of IO to 8MB

diff --git a/t/diff-lib.sh b/t/diff-lib.sh
index 4bddeb591ecc17ec532164d0d6cf1ad1a54eb996..75a35fcd0699940aea51534b5fe954847bed7bb9 100644 (file)
--- a/t/diff-lib.sh
+++ b/t/diff-lib.sh
@@ -1,7 +1,5 @@
 :
 
-_x40='[0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f]'
-_x40="$_x40$_x40$_x40$_x40$_x40$_x40$_x40$_x40"
 sanitize_diff_raw='/^:/s/ '"$_x40"' '"$_x40"' \([A-Z]\)[0-9]*  / X X \1#       /'
 compare_diff_raw () {
     # When heuristics are improved, the score numbers would change.