Bug/Typo in the insertUI example

[chendaniely]

the "Relevant code chunks" section of the insertUI has a missing closing parenthesis.

It says:

server.R:
observeEvent(input$insertBtn, {
   insertUI(
     selector = '#placeholder',
     ui = radioButtons('rd4', 'Choose one', c('a', 'b', 'c')
   )
})

it should be

server.R:
observeEvent(input$insertBtn, {
   insertUI(
     selector = '#placeholder',
     ui = radioButtons('rd4', 'Choose one', c('a', 'b', 'c')) # missing paren here.
   )
})

The app that is listed in this current repo doesn't have the code that is displaying the text.
So I'm not sure where to sent the PR...