Commits on Aug 18, 2019

1. Allow Kernel#tap to be invoked with arguments like Kernel#send …

   Tapping methods without any arguments already has nice shorthand via
   `Symbol#to_proc`:
   
   ```ruby
   object.tap { |o| o.example }
   object.tap(&:example)
   ```
   
   Unfortunately once other arguments are involved we have to switch back
   to the longer form:
   
   ```ruby
   array.merge(other).tap { |a| a.delete(object) }
   ```
   
   This patch introduces a convenient shorthand for these cases which
   behaves similar to `Kernel#send`:
   
   ```ruby
   array.merge(other).tap(:delete, object)
   ```
   
   Calling `tap` without any arguments or block still raises
   `LocalJumpError`:
   
   ```ruby
   3.tap #=> LocalJumpError: no block given
   ```
   
   This also makes the existing shorthand even shorter:
   
   ```ruby
   object.tap { |o| o.example }
   object.tap(&:example)
   object.tap(:example)
   ```
   
   ---
   
   Ruby issue: https://bugs.ruby-lang.org/issues/15419

   

   shuber committed Aug 18, 2019
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