Empty lines are parsed incorrectly

[grumbleafrican]

Valid yaml with a blank line in the middle results in the content after blank line being ignored.

One can find a valid example yaml from various sources. For example:

• https://yaml.org/spec/1.2.2/#22-structures
• https://github.com/adrienverge/yamllint/blob/master/tests/yaml-1.2-spec-examples/example-2.17

The failure can be reproduced by adding the following yaml file and test case:

samples/spaces.yaml

---
  title: A Title

  say: yes

samples/spaces.lua

return {
  ["say"] = true,
  ["title"] = "A Title",
}

The above fails as:

lua-yaml# make
busted && luacheck yaml.lua
●●●●●●●●●●●●●●●●●◼●●●
20 successes / 1 failure / 0 errors / 0 pending : 0.043067 seconds

Failure → spec/test_spec.lua @ 29
Parsing in spaces
spec/test_spec.lua:32: Expected objects to be the same.
Passed in:
(table: 0x600001345c40) {
  [title] = 'A Title' }
Expected:
(table: 0x6000013d4340) {
 *[say] = true
  [title] = 'A Title' }
make: *** [test] Error 1