Description of problem:

Vim syntax highlight currently handles colons as special
characters inside literal and folded blocks and shows them as new
key value definition. The ':' inside a literal or a folded block
should be treated as a regular character.

Version-Release number of selected component (if applicable):
vim-common-8.2.109-1.fc31.x86_64

Steps to Reproduce:
$ cat example.yaml
description: |
    Multiline blocks using the literal (|) or folded (>) style can
    contain colons: Text before them should not be highlighted.

Actual results:
String 'contain colons' highlighted.

Expected results:
String 'contain colons' in regular color.

Additional info:
https://yaml-multiline.info/