drop -e for echo as some shell-builtin echos print the -e verbatim

tsa/howto/new-machine.mdwn

@@ -59,7 +59,7 @@
         read sha256 filename && \
         cd /var/lib/puppet/ssl/ca/requests && \
         ( [ -e $filename ] || (echo "$filename does not exist."; exit 1) ) && \
-        echo -e "$sha256  $filename" | sha256sum -c && \
+        echo "$sha256  $filename" | sha256sum -c && \
         puppet ca sign $(basename "$filename" .pem) && \
         echo && \
         echo "--- 8< --- CUT HERE --- 8< ---" && \