[skeleton] prescripts problem

[pkra]

I couldn't test with MathJax v4 / SRE 4.1 due to https://github.com/mathjax/MathJax/issues/3080 but I ran into the following problem with SRE v4.0.5.

For example, \prescript {h_{l-1}}{}{P}

gives me

 <math
        xmlns="http://www.w3.org/1998/Math/MathML"
        data-semantic-structure="(10 0 1 (7 2 (6 3 4 5)) 8 9)"
        ><mmultiscripts
          data-semantic-type="tensor"
          data-semantic-role="latinletter"
          data-semantic-id="10"
          data-semantic-children="0,1,7,8,9"
          data-semantic-collapsed="(10 0 1 7 8 9)"
          data-semantic-owns="0 1 7 8 9"
          data-semantic-speech="Superscript h Super Subscript l minus 1 Baseline upper P"
          ><mi
            data-semantic-type="identifier"
            data-semantic-role="latinletter"
            data-semantic-font="italic"
            data-semantic-annotation="clearspeak:simple"
            data-semantic-id="0"
            data-semantic-parent="10"
            data-semantic-speech="upper P"
            data-semantic-prefix="Base"
            >P</mi
          ><none
            data-semantic-type="empty"
            data-semantic-role="rightsub"
            data-semantic-id="8"
            data-semantic-parent="10"
            data-semantic-added="true"
            data-semantic-speech=""
            data-semantic-prefix="Right Subscript"
          /><none
            data-semantic-type="empty"
            data-semantic-role="rightsuper"
            data-semantic-id="9"
            data-semantic-parent="10"
            data-semantic-added="true"
            data-semantic-speech=""
            data-semantic-prefix="Right Superscript"
          /><mprescripts /><none
            data-semantic-type="empty"
            data-semantic-role="leftsub"
            data-semantic-id="1"
            data-semantic-parent="10"
            data-semantic-speech=""
            data-semantic-prefix="Left Subscript"
          /><none
            data-semantic-type="subscript"
            data-semantic-role="leftsuper"
            data-semantic-id="7"
            data-semantic-children="2,6"
            data-semantic-parent="10"
            data-semantic-added="true"
            data-semantic-speech="h Super Subscript l minus 1"
            data-semantic-prefix="Left Superscript"
          /><msub
            data-semantic-type="subscript"
            data-semantic-role="leftsuper"
            data-semantic-id="7"
            data-semantic-children="2,6"
            data-semantic-parent="10"
            data-semantic-owns="2 6"
            ><mi
              data-semantic-type="identifier"
              data-semantic-role="latinletter"
              data-semantic-font="italic"
              data-semantic-annotation="clearspeak:simple"
              data-semantic-id="2"
              data-semantic-parent="7"
              data-semantic-speech="h"
              data-semantic-prefix="Base"
              >h</mi
            ><mrow
              data-mjx-texclass="ORD"
              data-semantic-type="infixop"
              data-semantic-role="subtraction"
              data-semantic-id="6"
              data-semantic-children="3,5"
              data-semantic-content="4"
              data-semantic-parent="7"
              data-semantic-owns="3 4 5"
              data-semantic-speech="l minus 1"
              data-semantic-prefix="Subscript"
              ><mi
                data-semantic-type="identifier"
                data-semantic-role="latinletter"
                data-semantic-font="italic"
                data-semantic-annotation="clearspeak:simple"
                data-semantic-id="3"
                data-semantic-parent="6"
                data-semantic-speech="l"
                >l</mi
              ><mo
                data-semantic-type="operator"
                data-semantic-role="subtraction"
                data-semantic-id="4"
                data-semantic-parent="6"
                data-semantic-operator="infixop,−"
                data-semantic-speech="minus"
                >−</mo
              ><mn
                data-semantic-type="number"
                data-semantic-role="integer"
                data-semantic-font="normal"
                data-semantic-annotation="clearspeak:simple"
                data-semantic-id="5"
                data-semantic-parent="6"
                data-semantic-speech="1"
                >1</mn
              ></mrow
            ></msub
          ></mmultiscripts
        ></math
      >

Note how data-semantic-speech="h Super Subscript l minus 1" is on the none with leftsuper.

[pkra]

I've re-tested this with SRE 4.1.0-beta.7 - the problem still occurs for me.