diff --git a/plugins/plugin-annotations/src/buttons.mjs b/plugins/plugin-annotations/src/buttons.mjs
index cf870fbdd4d..8b6c5bac2e2 100644
--- a/plugins/plugin-annotations/src/buttons.mjs
+++ b/plugins/plugin-annotations/src/buttons.mjs
@@ -7,11 +7,11 @@ export const buttonsDefs = [
   <circle
     cx="0" cy="0" r="3.4"
     class="mark"
-  />
-  <circle cx="-1" cy="-1" r="0.5" class="no-stroke fill-mark"/>
-  <circle cx="1"  cy="-1" r="0.5" class="no-stroke fill-mark" />
-  <circle cx="1"  cy="1"  r="0.5" class="no-stroke fill-mark" />
-  <circle cx="-1" cy="1"  r="0.5" class="no-stroke fill-mark" />
+  ></circle>
+  <circle cx="-1" cy="-1" r="0.5" class="no-stroke fill-mark"></circle>
+  <circle cx="1"  cy="-1" r="0.5" class="no-stroke fill-mark"></circle>
+  <circle cx="1"  cy="1"  r="0.5" class="no-stroke fill-mark"></circle>
+  <circle cx="-1" cy="1"  r="0.5" class="no-stroke fill-mark"></circle>
 </g>`,
   },
   {
@@ -21,7 +21,7 @@ export const buttonsDefs = [
   <path
     class="mark"
     d="M -1,-5 L 1,-5 L 1,5 L -1,5 z"
-  />
+  ></path>
 </g>`,
   },
   {
@@ -31,7 +31,7 @@ export const buttonsDefs = [
   <path
     class="mark"
     d="M -1,-10 L 1,-10 L 1,0 L -1,0 z"
-  />
+  ></path>
 </g>`,
   },
   {
@@ -41,15 +41,15 @@ export const buttonsDefs = [
   <path
     class="mark"
     d="M -1,0 L 1,0 L 1,10 L -1,10 z"
-  />
+  ></path>
 </g>`,
   },
   {
     name: 'snap-stud-grad',
     def: `
 <radialGradient id="snap-stud-grad" cx="50%" cy="50%" r="50%" fx="50%" fy="50%">
-  <stop offset="30%" style="stop-color:rgb(235,235,235); stop-opacity:1"/>
-  <stop offset="80%" style="stop-color:rgb(100,100,100);stop-opacity:1" />
+  <stop offset="30%" style="stop-color:rgb(235,235,235); stop-opacity:1"></stop>
+  <stop offset="80%" style="stop-color:rgb(100,100,100);stop-opacity:1"></stop>
 </radialGradient>`,
   },
   {
@@ -58,14 +58,14 @@ export const buttonsDefs = [
 <g id="snap-stud">
   <circle id="snap-stud-circle-edge" cx="0" cy="0" r="3.4"
     style="stroke:#666;fill:#dddddd;stroke-width:0.3;"
-  />
+  ></circle>
   <circle id="snap-stud-circle-middle" cx="0" cy="0" r="1.8"
     style="stroke:none;fill:url(#snap-stud-grad);"
-  />
+  ></circle>
   <path
     id="snap-stud-lines" style="fill:none;stroke:#666; stroke-width:0.2;"
     d="M -2,0 L -3,0 M 2,0 L 3,0 M 0,2 L 0,3 M 0,-2 L 0,-3 M 1.5,1.5 L 2.1,2.1 M -1.5,1.5 L -2.1,2.1 M -1.5,-1.5 L -2.1,-2.1 M 1.5,-1.5 L 2.1,-2.1"
-  />
+  ></path>
 </g>`,
   },
   {
@@ -74,14 +74,14 @@ export const buttonsDefs = [
 <g id="snap-socket">
   <circle id="snap-socket-circle-edge" cx="0" cy="0" r="3.4"
     style="stroke:#666;fill:#bbbbbb;stroke-width:0.3;"
-  />
+  ></circle>
   <circle id="snap-socket-circle-middle" cx="0" cy="0" r="2"
     style="stroke:#666;fill:#dddddd; stroke-width:0.4;"
-  />
+  ></circle>
   <path
     style="fill:none;stroke:#666; stroke-width:0.5;"
     d="M -1.7,-1 L -1.7,1 M 1.7,-1 L 1.7,1" id="snap-socket-lines"
-  />
+  ></path>
 </g>`,
   },
 ]