test: drop whitespace after shell redirection operators

(The one case that is left unchanged is '< <(subcommand)'.)

This way, the style with no gap was already dominant. This way, the reader
immediately knows that ' < ' is a comparison operator and ' << ' is a shift.

In a few cases, replace custom EOF replacement by just EOF. There is no point
in using someting like "_EOL" unless "EOF" appears in the text.

.semaphore/semaphore-runner.sh

@@ -28,14 +28,14 @@ create_container() {
 
     # enable source repositories so that apt-get build-dep works
     sudo lxc-attach -n "$CONTAINER" -- sh -ex <<EOF
-sed 's/^deb/deb-src/' /etc/apt/sources.list >> /etc/apt/sources.list.d/sources.list
+sed 's/^deb/deb-src/' /etc/apt/sources.list >>/etc/apt/sources.list.d/sources.list
 # We might attach the console too soon
 while ! systemctl --quiet --wait is-system-running; do sleep 1; done
 # Manpages database trigger takes a lot of time and is not useful in a CI
 echo 'man-db man-db/auto-update boolean false' | debconf-set-selections
 # Speed up dpkg, image is thrown away after the test
 mkdir -p /etc/dpkg/dpkg.cfg.d/
-echo 'force-unsafe-io' > /etc/dpkg/dpkg.cfg.d/unsafe_io
+echo 'force-unsafe-io' >/etc/dpkg/dpkg.cfg.d/unsafe_io
 # For some reason, it is necessary to run this manually or the interface won't be configured
 # Note that we avoid networkd, as some of the tests will break it later on
 dhclient
@@ -74,7 +74,7 @@ for phase in "${PHASES[@]}"; do
 
             # craft changelog
             UPSTREAM_VER="$(git describe | sed 's/^v//;s/-/./g')"
-            cat << EOF > debian/changelog.new
+            cat <<EOF >debian/changelog.new
 systemd (${UPSTREAM_VER}.0) UNRELEASED; urgency=low
 
   * Automatic build for upstream test
@@ -92,7 +92,7 @@ EOF
             # enable more unit tests
             sed -i '/^CONFFLAGS =/ s/=/= --werror -Dtests=unsafe -Dsplit-usr=true -Dslow-tests=true -Dfuzz-tests=true -Dman=true /' debian/rules
             # no orig tarball
-            echo '1.0' > debian/source/format
+            echo '1.0' >debian/source/format
 
             # build source package
             dpkg-buildpackage -S -I -I"$(basename "$CACHE_DIR")" -d -us -uc -nc