Avoid nuisance error printout from readlink test

2>&1 > /dev/null does not do what I expected, > /dev/null 2>&1 does.

hg-fast-export.sh

@@ -8,7 +8,7 @@ if command -v greadlink > /dev/null; then
   READLINK="greadlink" # Prefer greadlink over readlink
 fi
 
-if ! $READLINK -f "$(which "$0")" 2>&1 > /dev/null; then
+if ! $READLINK -f "$(which "$0")" > /dev/null 2>&1 ; then
     ROOT="$(dirname "$(which "$0")")"
     if [ ! -f "$ROOT/hg-fast-export.py" ] ; then
 	echo "hg-fast-exports requires a readlink implementation which knows" \
@@ -70,7 +70,7 @@ if test "z$IS_BARE" != ztrue; then
    # This is not a bare repo, cd to the toplevel
    TOPLEVEL=$(git rev-parse --show-toplevel) \
        || (echo "Could not find git repo toplevel" ; exit 1)
-   cd $TOPLEVEL || exit 1
+   cd "$TOPLEVEL" || exit 1
 fi
 GIT_DIR=$(git rev-parse --git-dir) || (echo "Could not find git repo" ; exit 1)