Fix/typos

[ariskk]

Hi!
I am dipping my toes in Lightning and Eclair. While I was reading the docs, IntelliJ was suggesting a few typo fixes and I thought I should contribute them.

If that's ok, I may next fix collection deprecation warnings as I am reading and understanding the code.

[codecov-io]

Codecov Report

Merging #1684 (5e4c6dd) into master (f241ef9) will decrease coverage by 0.00%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #1684      +/-   ##
==========================================
- Coverage   85.98%   85.97%   -0.01%     
==========================================
  Files         151      151              
  Lines       11455    11455              
  Branches      500      500              
==========================================
- Hits         9850     9849       -1     
- Misses       1605     1606       +1     

Impacted Files	Coverage Δ
...clair/blockchain/electrum/ElectrumClientPool.scala	78.49% <100.00%> (ø)
...cala/fr/acinq/eclair/payment/relay/NodeRelay.scala	93.70% <0.00%> (-1.58%)	⬇️
...nq/eclair/blockchain/electrum/ElectrumClient.scala	73.52% <0.00%> (-0.37%)	⬇️
...cala/fr/acinq/eclair/crypto/TransportHandler.scala	90.76% <0.00%> (+0.54%)	⬆️
...q/eclair/blockchain/electrum/ElectrumWatcher.scala	77.77% <0.00%> (+0.79%)	⬆️

[t-bast]

LGTM, thanks.

I may next fix collection deprecation warnings

Please don't fix them yet. We're waiting a bit before we do, because we need to keep the master branch merge-able with the android branch that is on an older Java version (because it's used for eclair-mobile). We will fix all these warnings once we can safely move mobile apps to a different lightning backend (based on Kotlin). There are some additional details in #1393