Change sed command.

Change-Id: I15c796a5359f8c41cc0a3447e6f65aa68bc14d00

generateModuleGraphs.sh

@@ -115,10 +115,10 @@ echo "$module_paths" | while read -r module_path; do
 
         # Convert to SVG using dot, remove unnecessary comments, and reformat
         dot -Tsvg "/tmp/${file_name}.gv" |
-          sed 's/<!--/\x0<!--/g;s/-->/-->\x0/g' | grep -zv '^<!--' | tr -d '\0' |
+          sed -e 's/<!--.*//g' -e 's/-->.*//g' | grep -zv '^<!--' | tr -d '\0' |
           xmllint --format - \
           > "docs/images/graphs/${file_name}.svg"
         # Remove the temporary .gv file
         rm "/tmp/${file_name}.gv"
     fi
-done
+done