Sabotaging a key does not fail `grunt modulify --targets=strings`

Sabotaging a key does not fail grunt modulify --targets=strings

For instance,

  soluteConcentrationsAccordionBox:
    accessibleParagraph: A barchart for each solute captures amounts on either side of membrane, recent crossings captured with visual highlights and sounds. If needed, pause sim to freeze details for reading.
    barChart:
      accessibleName: "{ a11y.solute }: { a11y.soluteConcentrationsAccordionBox.barChart.comparison } { a11y.soluteConcentrationsAccordionBox.barChart.crossing }."
      comparison:     |-
                      { $amount ->
                        [aLittleMore]  A little more
                        [aLotMore]     A lot more
                        [aLittleLess]  A little less
                        *[aLotLess]     A lot less
                      } outside than inside
      crossing:       |-
                      { $crossing ->
                        *[none] no crossings
                        [inside] crossings in
                        [outside] crossings out
                        [both] crossings in and out
                      }

is correct, but if adjusted to:

  soluteConcentrationsAccordionBox:
    accessibleParagraph: A barchart for each solute captures amounts on either side of membrane, recent crossings captured with visual highlights and sounds. If needed, pause sim to freeze details for reading.
    barChart:
      accessibleName: "{ a11y.solute }: { a11y.HELLOWORLD.barChart.comparison } { a11y.soluteConcentrationsAccordionBox.barChart.crossing }."
      comparison:     |-
                      { $amount ->
                        [aLittleMore]  A little more
                        [aLotMore]     A lot more
                        [aLittleLess]  A little less
                        *[aLotLess]     A lot less
                      } outside than inside
      crossing:       |-
                      { $crossing ->
                        *[none] no crossings
                        [inside] crossings in
                        [outside] crossings out
                        [both] crossings in and out
                      }

It should fail, but does not fail.