Remove newlines from strings in Rails

Rails has a method called squish that will remove newlines from strings. It works very nicely with heredocs, where you may want readability but don't really want the newlines.

Without squish:

<<~SQL
  update posts
  set status = 'public'
  where status is null;
SQL
# "update posts\nset status = 'public'\nwhere status is null;\n"

With squish:

<<~SQL.squish
  update posts
  set status = 'public'
  where status is null;
SQL
# "update posts set status = 'public' where status is null;"