Fixes to edit review

03_how_ln_works.asciidoc

@@ -210,7 +210,7 @@ With a strong penalty mechanism, Alice is not tempted to cheat by publishing an
 [NOTE]
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 In Mastering Bitcoin Andreas states it very elegantly:
-A key characteristic of bitcoin is that once a transaction is valid, it remains valid and does not expire. The only way to cancel a transaction is by double-spending its inputs with another transaction before it was mined. That's why we used timelocks [...] to ensure that more recent commitments could be spent before older commitments were valid.
+"A key characteristic of bitcoin is that once a transaction is valid, it remains valid and does not expire. The only way to cancel a transaction is by double-spending its inputs with another transaction before it is mined."
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 Now that we understand _why_ a penalty mechanism is needed and how it will prevent cheating, let's see _how_ it works in detail.