support/download: fix shellcheck errors in svn backend

Bizarrely enough, the unquoted expansion of ${quiet} does not trigger
any warning from shellcheck, so we do not add any exception for it.

${SVN} can contain more than one item, but we don't care about splitting
on spaces when we just print it for debug, so we can just quote it
rather than add an exception.

Signed-off-by: Yann E. MORIN <yann.morin@orange.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

.checkpackageignore

@@ -1651,7 +1651,6 @@ support/download/go-post-process Shellcheck
 support/download/hg Shellcheck
 support/download/scp Shellcheck
 support/download/sftp Shellcheck
-support/download/svn Shellcheck
 support/download/wget Shellcheck
 support/gnuconfig/update Shellcheck
 support/libtool/buildroot-libtool-v1.5.patch ApplyOrder Sob Upstream

support/download/svn

@@ -20,6 +20,7 @@ set -e
 # Environment:
 #   SVN      : the svn command to call
 
+# shellcheck disable=SC1090 # Only provides mk_tar_gz()
 . "${0%/*}/helpers"
 
 quiet=
@@ -41,12 +42,13 @@ shift $((OPTIND-1)) # Get rid of our options
 # being expanded a second time (in case there are spaces in them)
 _svn() {
     if [ -z "${quiet}" ]; then
-        printf '%s ' ${SVN} "${@}"; printf '\n'
+        printf '%s ' "${SVN}" "${@}"; printf '\n'
     fi
     _plain_svn "$@"
 }
 # Note: please keep command below aligned with what is printed above
 _plain_svn() {
+    # shellcheck disable=SC2086 # We want word-splitting for SVN
     eval ${SVN} "${@}"
 }