what can a signal "be used to avoid" in 9_signals.md

[travisfw]

A sentence in 9_signals is incomplete

see src/pages/concepts/9_signals.md (or on developer.holochain.org )

I am guessing there is something to say about latency or waiting on I/O.

[ThetaSinner]

I think that should say something about polling most likely. By signalling a peer to inform them of data being created, you can work around the lack of an event driven system within Holochain that results in some amount of polling in most hApps.

I'll get this scheduled to be fixed, thank you!