GEMS14 — Multiple issues with ASCII PSM examples

The message examples for the ASCII PSM have the following issues. This is in addition to a handful of issue reported under Issue 19597.

1. The hex value examples have type "hexvalue". This should be "hex_value" (with underscore).

2. All examples have an extra space after the first pipe, e.g. "| GEMS|01|...". We should be able to use the examples literally.

3. The SetConfigMessage example still contains the long-removed "valid state" field. The "2" should be removed from the example, i.e.
SET-R|SUCCESS| The SET request was successful.||TRUE
instead of
SET-R|SUCCESS| The SET request was successful.|2|TRUE

4. The GEMS version in all examples should be updated to the latest ("14"). Right now it's using "01".

5. There is no ASCII example for the PING message. It should be:
Message: |GEMS|14|000122|123|CS123|111111111.222000000|FrameSync1|PING|END
Response: |GEMS|14|000122|123|CS123|111111111.222000000|FrameSync1|PING-R|SUCCESS|The PING request was successful.|END

Multiple issues with the GEMS-ASCII Examples

This issue captures a number of minor syntax errors within the example provided in the specification. Almost all are a result of document formatting or our inability to keep the examples up to date. Now that the examples are removed from the specification this issue is OBE. The existing online examples correct these errors and include an example of the PING message.