updating format of yaml for concept lists

.github/workflows/check-core-list.yml

@@ -12,6 +12,6 @@ jobs:
   validate-yaml-core-concept-list:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v7
       - name: Validate YAML intent lists
         run: yamllint -c _data/_config_yamllint.yml _data/core.yml

.github/workflows/check-core-properties-list.yml

@@ -12,6 +12,6 @@ jobs:
   validate-yaml-core-properties-concept-list:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v7
       - name: Validate YAML intent lists
         run: yamllint -c _data/_config_yamllint.yml _data/core-properties.yml

.github/workflows/check-open-list.yml

@@ -12,6 +12,6 @@ jobs:
   validate-yaml-open-concept-list:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v7
       - name: Validate YAML intent lists
         run: yamllint -c _data/_config_yamllint.yml _data/open.yml

_data/core-properties.yml

@@ -141,21 +141,17 @@
           <mtd columnalign='right'>
            <mn>2</mn><mo>&#x2062;</mo><mi>x</mi>
           </mtd>
-          <mtd columnalign='center'>
-           <mo>=</mo>
-          </mtd>
           <mtd columnalign='left'>
+           <mo form="infix">=</mo>
            <mn>1</mn>
           </mtd>
          </mtr>
          <mtr>
           <mtd columnalign='right'>
            <mi>y</mi>
           </mtd>
-          <mtd columnalign='center'>
-           <mo>></mo>
-          </mtd>
           <mtd columnalign='left'>
+           <mo form="infix">></mo>
            <mi>x</mi><mo>&#x2212;</mo><mn>3</mn>
           </mtd>
          </mtr>