Empty line in multiline Yaml strings are not recognised

[oldium]

This is a continuation of almost 5 years-old bug, please see also https://sourceforge.net/p/scintilla/bugs/2218/ and notepad-plus-plus/notepad-plus-plus#9038

The following Yaml is not correctly highlighted (I enhanced the example from the older bugs):

my_yaml_block: |+
  This block is text

  even if the line above is empty
  these two text lines should also be highlighted as text. 
 
 

# End of example, should be the end of text rendering

Empty lines and lines containing only spaces (even shorter than the indent) should be considered to be part of the string. Currently the highlighting stops at This block is text line. The Yaml in the example above really has 4 new-line characters at the end when using |+ block (see https://www.bairesdev.com/tools/json2yaml/ to check that).

Update: fixed rendering of the example, the empty line at the end was not rendered.

[theonlypwner]

There is a similar issue

- run: |
    # first line of shell script
    # last line of shell script
  if: condition for running step

screenshot from Notepad++ 8.8.5 (Scintilla/Lexilla included: 5.5.7/5.4.5):