Need to clarify the description of MEMO_TEXT.

[overcat]

What version are you using?

The latest version.

What did you do?

In the document, the description of MEMO_TEXT is as follows:

MEMO_TEXT : A string encoded using either ASCII or UTF-8, up to 28-bytes long.

In fact, it can be anything, which often confuses users, and I think this should be clarified in the documentation.

Here are some related discussions:

• https://github.com/stellar/stellar-core/issues/2310
• https://github.com/stellar/go/issues/2022

What did you expect to see?

None

What did you see instead?

None

[loydie28]

hi

[loydie28]

#510