Re: diff_opts initialization missing in examples/test

[Akim Demaille]

Hi Martin,

Thanks, I'm installing this:

commit 2ca158c893ed6a568c582d9c006bdc209a63267c
Author: Martin Rehak <martin.rehak@oracle.com>
Date:   Wed Nov 18 09:10:01 2020 +0100

    examples: avoid "unbound variable" errors
    
    When the shell option `nounset` is set, we may get "unbound variable"
    errors.
    https://lists.gnu.org/r/bug-bison/2020-11/msg00013.html
    
    * examples/test (diff_opts): Be sure to initialize it.

diff --git a/examples/test b/examples/test
index 81076701..7590e128 100755
--- a/examples/test
+++ b/examples/test
@@ -37,6 +37,7 @@ strip_prompt=false
 # If diff supports --strip-trailing-cr, use it, to avoid EOL issues
 # when testing Java programs on Windows.
 echo "checking for diff --strip-trailing-cr..."
+diff_opts=
 if diff --strip-trailing-cr "$1" "$1"; then
   diff_opts=--strip-trailing-cr
 fi