Escaping $ in root.sh so that mpdJupyROOT is created correctly.

root.sh

@@ -239,9 +239,9 @@ make install
 
 cat >> "$INSTALLROOT/bin/mpdJupyROOT" <<EoF
 #!/bin/bash
-if [ -n "$1" ]; then
-  IFS=: read -r IP PORT <<< $1
-  root --notebook --ip=$IP --port=$PORT
+if [ -n "\$1" ]; then
+  IFS=: read -r IP PORT <<< \$1
+  root --notebook --ip=\$IP --port=\$PORT
 else
   root --notebook
 fi