Add newline to usage output in function.usage.sh.

Author: Potherca

src/function.usage.sh

@@ -10,7 +10,7 @@ usage() {
     sScript="$(basename "${sFile}")"
     sUsage="$(grep '^##' <"${sFile}" | cut -c4-)"
 
- echo -e "${sUsage//\$0/${sScript}}"
+ echo -e "${sUsage//\$0/${sScript}}\n"
 }
 
 if [ "${BASH_SOURCE[0]}" != "${0}" ]; then