Recommend `require: false` in Gemfile
Recommend `require: false` in Gemfile

Capistrano gems shouldn't be loaded within a Rails (or any) app. They
are intended to be used by the cap command, not within Rails itself. At
best, `require: true` (the default) is unnecessary; at worst, it can
cause conflicts as encountered here:

https://stackoverflow.com/q/48493332/4625365

Update our docs to recommend `require: false` just to be safe.

capistrano/rails