remote-helpers/test-bzr.sh: do not use "grep '\s'"

Using grep "devel\s\+3:" to find at least one whitspace is not
portable on all grep versions; not all grep versions understand "\s"
as a "whitespace".

Use a literal TAB followed by SPACE.

The + as a qualifier for "one or more" is not a basic regular
expression; use egrep instead of grep.

Signed-off-by: Torsten Bögershausen <tboegi@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

contrib/remote-helpers/test-hg.sh

@@ -115,7 +115,7 @@ test_expect_success 'update bookmark' '
   git push
   ) &&
 
-  hg -R hgrepo bookmarks | grep "devel\s\+3:"
+  hg -R hgrepo bookmarks | egrep "devel[	 ]+3:"
 '
 
 test_done