tests: avoid the :> construct which can hide errors

On most shells `:>file || framework_failure_` will not evaluate
the framework_failure_ even if there was an error writing the file.
shells which do evaluate the failure are ksh 93u+ and bash 4.2,
while shells wich don't include bash 4.3, solaris, freebsd, dash.

Furthermore this construct is problematic on Solaris 10 sh,
which will try to optimize away a `:' command in a loop
after the first iteration, even if it is redirected.

* tests/cp/link-deref.sh: Remove the leading colon on redirections.
* tests/cp/reflink-perm.sh: Likewise.
* tests/id/zero.sh: Likewise.
* tests/install/install-C.sh: Likewise.
* tests/misc/env.sh: Likewise.
* tests/misc/md5sum-bsd.sh: Likewise.
* tests/misc/runcon-no-reorder.sh: Likewise.
* tests/mv/partition-perm.sh: Likewise.
* tests/rm/r-root.sh: Likewise.
* tests/split/l-chunk.sh: Likewise.
* tests/split/line-bytes.sh: Likewise.
* tests/tail-2/inotify-rotate.sh: Likewise.
* tests/tail-2/retry.sh: Likewise.
* tests/tail-2/symlink.sh: Likewise.
* tests/tail-2/wait.sh: Likewise.
* tests/touch/read-only.sh: Likewise.
+ cfg.mk (sc_prohibit_colon_redirection): A new syntax check
to avoid further instances of this creeping in.

1 files changed, 1 insertions, 1 deletions

diff --git a/tests/tail-2/wait.sh b/tests/tail-2/wait.sh
index 42a93bfe6..13898acf1 100755
--- a/tests/tail-2/wait.sh
+++ b/tests/tail-2/wait.sh
@@ -52,7 +52,7 @@ for inotify in ---disable-inotify ''; do
   grep -Ev 'inotify (resources exhausted|cannot be used)' tail.err > x
   mv x tail.err
   test -s tail.err && fail=1
-  :>tail.err
+  >tail.err
 
   tail_F()
   {