Fixes #3009
Fixes #3009

Resolves a slight typo in the documentation for GenEvent.swap_handler and shores up the backtick quoting surrouding it.

lexmag/elixir,kimshrier/elixir,pedrosnk/elixir,michalmuskala/elixir,kelvinst/elixir,kimshrier/elixir,gfvcastro/elixir,beedub/elixir,joshprice/elixir,antipax/elixir,pedrosnk/elixir,lexmag/elixir,antipax/elixir,ggcampinho/elixir,gfvcastro/elixir,kelvinst/elixir,beedub/elixir,elixir-lang/elixir,ggcampinho/elixir