Docs: 1.4 RNs add period and forward slash characters

For 1.4 RNs:
Per Fabian: "In the known issues section, in the issue ENTMQMAAS-1799 the text says "both period and forward slash " . It would be nice to have an example of what "period" is , like forward slash has, because there can be users that don't know what a period character is"