t0021: compute file size with a single process instead of a pipeline

Avoid unwanted coding patterns (prodigal use of pipelines), and in
particular a useless use of cat.

Signed-off-by: Johannes Sixt <j6t@kdbg.org>
Signed-off-by: Jeff King <peff@peff.net>

diff --git a/t/t0021-conversion.sh b/t/t0021-conversion.sh
index db71aca..cb72fa4 100755 (executable)
--- a/t/t0021-conversion.sh
+++ b/t/t0021-conversion.sh
@@ -22,7 +22,7 @@ generate_random_characters () {
 }
 
 file_size () {
-       cat "$1" | wc -c | sed "s/^[ ]*//"
+       perl -e 'print -s $ARGV[0]' "$1"
 }
 
 filter_git () {