Fix instances of SC2006 in test_keygen.sh

src/test/test_keygen.sh

@@ -13,7 +13,7 @@ if [ $# -eq 0 ] || [ ! -f ${1} ] || [ ! -x ${1} ]; then
   fi
 fi
 
-UNAME_OS=`uname -s | cut -d_ -f1`
+UNAME_OS=$(uname -s | cut -d_ -f1)
 if test "$UNAME_OS" = 'CYGWIN' || \
    test "$UNAME_OS" = 'MSYS' || \
    test "$UNAME_OS" = 'MINGW'; then
@@ -65,10 +65,10 @@ die() { echo "$1" >&2 ; exit 5; }
 check_dir() { [ -d "$1" ] || die "$1 did not exist"; }
 check_file() { [ -e "$1" ] || die "$1 did not exist"; }
 check_no_file() { [ -e "$1" ] && die "$1 was not supposed to exist" || true; }
-check_files_eq() { cmp "$1" "$2" || die "$1 and $2 did not match: `dump $1` vs `dump $2`"; }
+check_files_eq() { cmp "$1" "$2" || die "$1 and $2 did not match: $(dump $1) vs $(dump $2)"; }
 check_keys_eq() { check_files_eq "${SRC}/keys/${1}" "${ME}/keys/${1}"; }
 
-DATA_DIR=`mktemp -d -t tor_keygen_tests.XXXXXX`
+DATA_DIR=$(mktemp -d -t tor_keygen_tests.XXXXXX)
 if [ -z "$DATA_DIR" ]; then
   echo "Failure: mktemp invocation returned empty string" >&2
   exit 3
@@ -80,7 +80,7 @@ fi
 trap "rm -rf '$DATA_DIR'" 0
 
 # Use an absolute path for this or Tor will complain
-DATA_DIR=`cd "${DATA_DIR}" && pwd`
+DATA_DIR=$(cd "${DATA_DIR}" && pwd)
 
 touch "${DATA_DIR}/empty_torrc"
 
@@ -143,7 +143,7 @@ ME="${DATA_DIR}/case2a"
 SRC="${DATA_DIR}/orig"
 mkdir -p "${ME}/keys"
 cp "${SRC}/keys/ed25519_master_id_public_key" "${ME}/keys/"
-${TOR} --DataDirectory "${ME}" --list-fingerprint > "${ME}/stdout" && die "Somehow succeeded when missing secret key, certs: `cat ${ME}/stdout`" || true
+${TOR} --DataDirectory "${ME}" --list-fingerprint > "${ME}/stdout" && die "Somehow succeeded when missing secret key, certs: $(cat ${ME}/stdout)" || true
 check_files_eq "${SRC}/keys/ed25519_master_id_public_key" "${ME}/keys/ed25519_master_id_public_key"
 
 grep "We needed to load a secret key.*but couldn't find it" "${ME}/stdout" >/dev/null || die "Tor didn't declare that it was missing a secret key"