Phrasing of Sync and Send

[richard-hajek]

The current documentation describes Send and Sync in this way:

• A type is Send if it is safe to send it to another thread.

• A type is Sync if it is safe to share between threads (T is Sync if and only if &T is Send).

This wording is unclear to me, overly formal yet vague (what does it mean, exactly, "send to another thread"?)

Proposed change:

• Send: A type is Send if it can be moved into another thread.

• Sync: A type is Sync if it can be borrowed into another thread. (T is Sync if and only if &T is Send)

This phrasing doesn't change the meaning but makes it much more clear IMHO.

[shoebilyas123]

Requesting permission to work on this

[richard-hajek]

Is it up to me to give this permission? sorry I was unaware, go ahead sure

[shoebilyas123]

Thank you very much! I will take out time this Sunday to raise a PR

[richard-hajek]

Tag me when you do!