[PATCH] p5311: handle spaces in wc(1) output

["René Scharfe" <l.s.r@web.de>]

Some implementations of wc(1) align their output with leading spaces,
even when just a single number is requested, e.g. with "wc -c".  p5311
runs all tests successfully on such a platform, but fails to aggregate
their results and reports:

   # passed all 33 test(s)
   1..33
   bad input line:    57144

Use the helper function test_file_size to get the number without any
spaces in a portable way to avoid the issue.

Signed-off-by: René Scharfe <l.s.r@web.de>
---
 t/perf/README                      | 2 +-
 t/perf/p5311-pack-bitmaps-fetch.sh | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/t/perf/README b/t/perf/README
index fb9127a66f..802402d738 100644
--- a/t/perf/README
+++ b/t/perf/README
@@ -190,7 +190,7 @@ shown in the aggregated output. For example:
 	'

 	test_size 'output size'
-		wc -c <foo.out
+		test_file_size foo.out
 	'

 might produce output like:
diff --git a/t/perf/p5311-pack-bitmaps-fetch.sh b/t/perf/p5311-pack-bitmaps-fetch.sh
index 47c3fd7581..ed0c7570d7 100755
--- a/t/perf/p5311-pack-bitmaps-fetch.sh
+++ b/t/perf/p5311-pack-bitmaps-fetch.sh
@@ -33,7 +33,7 @@ for days in 1 2 4 8 16 32 64 128; do
 	'

 	test_size "size   $title" '
-		wc -c <tmp.pack
+		test_file_size tmp.pack
 	'

 	test_perf "client $title" '
--
2.33.0