Bug: Indentation indicator after chomping indicator is not recognized, appearing as illegal

[geekley]

The YAML spec says that in block scalars, both indicators can appear in any order.
This is the case since YAML 1.0: https://yaml.org/spec/1.0/index.html#id2566934

# Modifiers may be combined in any order.
indented and chomped: |2-
    This has no newline.

also written as: |-2
    This has no newline.

both are equal to: "  This has no newline."

Also on latest YAML 1.2.2: https://yaml.org/spec/1.2.2/#rule-c-b-block-header

[162] c-b-block-header(t) ::=
  (
      (
        c-indentation-indicator
        c-chomping-indicator(t)
      )
    | (
        c-chomping-indicator(t)
        c-indentation-indicator
      )
  )
  s-b-comment

But the grammar only allows the number before the chomping indicator:
https://github.com/textmate/yaml.tmbundle/blob/master/Syntaxes/YAML.tmLanguage#L217
(?:(\|)|(>))([1-9])?([-+])?(.*\n?)

Example:

should-work1: |+2
  string
should-work2: >+2
  string
should-work3: |-2
  string
should-work4: >-2
  string
works1: |2+
  string
works2: >2+
  string
works3: |2-
  string
works4: >2-
  string