fix: the height of docs view get wrong when content lines get wrapped

When the wrap_at option not pass to vim.lsp.util._make_floating_popup_size(),
it calculates height with unwrapped lines.
Actually the nvim-cmp shows content with wrapped lines in docs view.
So when the content has very long text, the calculated height is smaller than
actually required in docs view.

lua/cmp/view/docs_view.lua

@@ -58,6 +58,7 @@ docs_view.open = function(self, e, view)
  local opts = {
  max_width = max_width - border_info.horiz,
  }
+ opts.wrap_at = opts.max_width
  if documentation.max_height > 0 then
  opts.max_height = documentation.max_height
  end
@@ -71,6 +72,7 @@ docs_view.open = function(self, e, view)
  local opts = {
  max_width = max_width - border_info.horiz,
  }
+ opts.wrap_at = opts.max_width
  if documentation.max_height > 0 then
  opts.max_height = documentation.max_height - border_info.vert
  end