LU-10401 tests: fix error from 'tr -d='

LU-10401 tests: fix error from 'tr -d='

Fix an error from using "tr -d=" instead of "tr -d =" in
sanity test_133g.

Test-Parameters: trivial
Fixes: 83b6c6608e9 ("LU-11644 ptlrpc: show target name in req_history")
Signed-off-by: Andreas Dilger <adilger@whamcloud.com>
Change-Id: I1bac18c7a41bc45c250d8a95ef7489d73f3ebbe5
Reviewed-on: https://review.whamcloud.com/38444
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: James Nunez <jnunez@whamcloud.com>
Reviewed-by: Jian Yu <yujian@whamcloud.com>
Reviewed-by: Neil Brown <neilb@suse.de>
Reviewed-by: Oleg Drokin <green@whamcloud.com>