Allow for spaces in tags (surrounded by quotes)

[meztez]

Fixes #350

Allow to use spaces in tabs (or other character) as long as they are surrounded by quotes or double quotes.

Fix regex to allow one character description in description for response and tags.

Also reversed order of list elements to match plumber file written order, as appear on screen. This applies to plumber decoration that can be repeated in the same block.

#* @apiTag "a b" Space with double quote
#* @apiTag 'c d' Space with single quote

#* @serializer csv
#* @get /test
#* @tag 'a b'
#* @tag "c d"
function() {
  mtcars
}

In reference to #350

PR task list:

• Update NEWS
• Add tests
• Update documentation with devtools::document()