Fix misc/check-no-diff on macOS.

dan-zheng · dan-zheng · commit b9e728627830 · 2023-04-03T19:20:47.000-07:00
diff on macOS does not support the `--left-column` flag.
diff --git a/misc/check-no-diff b/misc/check-no-diff
@@ -11,7 +11,7 @@
 # non-zero error status.
 
 tmpdiff=$(mktemp)
-diff --left-column -y $1 $2 > $tmpdiff \
+diff -y $1 $2 > $tmpdiff \
        && echo OK || (cat $tmpdiff; false)
 status=$?
 
