--- /home/igalia/clopez/webkit/webkit-flatpak/layout-test-results/mathml/presentation/mo-stretch-expected.txt
+++ /home/igalia/clopez/webkit/webkit-flatpak/layout-test-results/mathml/presentation/mo-stretch-actual.txt
@@ -30,11 +30,11 @@
               RenderText {#text} at (0,-45) size 4x106
                 text run at (0,-45) width 4: "]"
           RenderMathMLOperator {mo} at (50,6) size 8x24
-            RenderBlock (anonymous) at (0,0) size 7x16
+            RenderBlock (anonymous) at (0,0) size 7x17
               RenderText {#text} at (0,-45) size 7x106
                 text run at (0,-45) width 7: "\x{2308}"
           RenderMathMLOperator {mo} at (58,6) size 8x24
-            RenderBlock (anonymous) at (0,0) size 7x16
+            RenderBlock (anonymous) at (0,0) size 7x17
               RenderText {#text} at (0,-45) size 7x106
                 text run at (0,-45) width 7: "\x{2309}"
           RenderMathMLOperator {mo} at (66,6) size 8x24
@@ -50,15 +50,15 @@
               RenderText {#text} at (0,-44) size 11x106
                 text run at (0,-44) width 11: "\x{222B}"
           RenderMathMLOperator {mo} at (98,6) size 9x24
-            RenderBlock (anonymous) at (0,0) size 4x16
-              RenderText {#text} at (0,-45) size 4x106
-                text run at (0,-45) width 4: "|"
-          RenderMathMLOperator {mo} at (106,6) size 7x16
-            RenderBlock (anonymous) at (0,0) size 6x16
-              RenderText {#text} at (0,-45) size 6x106
-                text run at (0,-45) width 6: "\x{2016}"
-          RenderMathMLOperator {mo} at (112,6) size 18x16
-            RenderBlock (anonymous) at (0,0) size 8x16
+            RenderBlock (anonymous) at (0,0) size 4x17
+              RenderText {#text} at (0,-45) size 4x106
+                text run at (0,-45) width 4: "|"
+          RenderMathMLOperator {mo} at (106,5) size 7x17
+            RenderBlock (anonymous) at (0,0) size 6x17
+              RenderText {#text} at (0,-45) size 6x106
+                text run at (0,-45) width 6: "\x{2016}"
+          RenderMathMLOperator {mo} at (112,5) size 18x17
+            RenderBlock (anonymous) at (0,0) size 8x17
               RenderText {#text} at (0,-45) size 8x106
                 text run at (0,-45) width 8: "\x{2225}"
       RenderText {#text} at (129,8) size 5x17
@@ -91,11 +91,11 @@
               RenderText {#text} at (0,-45) size 4x106
                 text run at (0,-45) width 4: "]"
           RenderMathMLOperator {mo} at (78,0) size 11x142
-            RenderBlock (anonymous) at (0,0) size 7x16
+            RenderBlock (anonymous) at (0,0) size 7x17
               RenderText {#text} at (0,-45) size 7x106
                 text run at (0,-45) width 7: "\x{2308}"
           RenderMathMLOperator {mo} at (89,0) size 11x142
-            RenderBlock (anonymous) at (0,0) size 7x16
+            RenderBlock (anonymous) at (0,0) size 7x17
               RenderText {#text} at (0,-45) size 7x106
                 text run at (0,-45) width 7: "\x{2309}"
           RenderMathMLOperator {mo} at (100,0) size 11x142
@@ -111,15 +111,15 @@
               RenderText {#text} at (0,-44) size 11x106
                 text run at (0,-44) width 11: "\x{222B}"
           RenderMathMLOperator {mo} at (138,0) size 9x142
-            RenderBlock (anonymous) at (0,0) size 4x16
+            RenderBlock (anonymous) at (0,0) size 4x17
               RenderText {#text} at (0,-45) size 4x106
                 text run at (0,-45) width 4: "|"
           RenderMathMLOperator {mo} at (146,0) size 8x76
-            RenderBlock (anonymous) at (0,0) size 6x16
+            RenderBlock (anonymous) at (0,0) size 6x17
               RenderText {#text} at (0,-45) size 6x106
                 text run at (0,-45) width 6: "\x{2016}"
           RenderMathMLOperator {mo} at (153,0) size 17x76
-            RenderBlock (anonymous) at (0,0) size 8x16
+            RenderBlock (anonymous) at (0,0) size 8x17
               RenderText {#text} at (0,-45) size 8x106
                 text run at (0,-45) width 8: "\x{2225}"
           RenderMathMLSpace {mspace} at (169,0) size 0x76
@@ -152,11 +152,11 @@
               RenderText {#text} at (0,-45) size 4x106
                 text run at (0,-45) width 4: "]"
           RenderMathMLOperator {mo} at (78,4) size 11x92
-            RenderBlock (anonymous) at (0,0) size 7x16
+            RenderBlock (anonymous) at (0,0) size 7x17
               RenderText {#text} at (0,-45) size 7x106
                 text run at (0,-45) width 7: "\x{2308}"
           RenderMathMLOperator {mo} at (89,4) size 11x92
-            RenderBlock (anonymous) at (0,0) size 7x16
+            RenderBlock (anonymous) at (0,0) size 7x17
               RenderText {#text} at (0,-45) size 7x106
                 text run at (0,-45) width 7: "\x{2309}"
           RenderMathMLOperator {mo} at (100,4) size 11x92
@@ -172,15 +172,15 @@
               RenderText {#text} at (0,-44) size 11x106
                 text run at (0,-44) width 11: "\x{222B}"
           RenderMathMLOperator {mo} at (138,4) size 9x92
-            RenderBlock (anonymous) at (0,0) size 4x16
+            RenderBlock (anonymous) at (0,0) size 4x17
               RenderText {#text} at (0,-45) size 4x106
                 text run at (0,-45) width 4: "|"
           RenderMathMLOperator {mo} at (146,0) size 8x58
-            RenderBlock (anonymous) at (0,0) size 6x16
+            RenderBlock (anonymous) at (0,0) size 6x17
               RenderText {#text} at (0,-45) size 6x106
                 text run at (0,-45) width 6: "\x{2016}"
           RenderMathMLOperator {mo} at (153,0) size 17x58
-            RenderBlock (anonymous) at (0,0) size 8x16
+            RenderBlock (anonymous) at (0,0) size 8x17
               RenderText {#text} at (0,-45) size 8x106
                 text run at (0,-45) width 8: "\x{2225}"
           RenderMathMLSpace {mspace} at (169,4) size 0x51
@@ -213,11 +213,11 @@
               RenderText {#text} at (0,-45) size 4x106
                 text run at (0,-45) width 4: "]"
           RenderMathMLOperator {mo} at (60,1) size 9x34
-            RenderBlock (anonymous) at (0,0) size 7x16
+            RenderBlock (anonymous) at (0,0) size 7x17
               RenderText {#text} at (0,-45) size 7x106
                 text run at (0,-45) width 7: "\x{2308}"
           RenderMathMLOperator {mo} at (69,1) size 9x34
-            RenderBlock (anonymous) at (0,0) size 7x16
+            RenderBlock (anonymous) at (0,0) size 7x17
               RenderText {#text} at (0,-45) size 7x106
                 text run at (0,-45) width 7: "\x{2309}"
           RenderMathMLOperator {mo} at (78,1) size 9x34
@@ -233,15 +233,15 @@
               RenderText {#text} at (0,-44) size 11x106
                 text run at (0,-44) width 11: "\x{222B}"
           RenderMathMLOperator {mo} at (112,1) size 9x34
-            RenderBlock (anonymous) at (0,0) size 4x16
+            RenderBlock (anonymous) at (0,0) size 4x17
               RenderText {#text} at (0,-45) size 4x106
                 text run at (0,-45) width 4: "|"
           RenderMathMLOperator {mo} at (120,0) size 7x24
-            RenderBlock (anonymous) at (0,0) size 6x16
+            RenderBlock (anonymous) at (0,0) size 6x17
               RenderText {#text} at (0,-45) size 6x106
                 text run at (0,-45) width 6: "\x{2016}"
           RenderMathMLOperator {mo} at (126,0) size 16x24
-            RenderBlock (anonymous) at (0,0) size 8x16
+            RenderBlock (anonymous) at (0,0) size 8x17
               RenderText {#text} at (0,-45) size 8x106
                 text run at (0,-45) width 8: "\x{2225}"
           RenderMathMLSpace {mspace} at (141,2) size 0x21
@@ -275,11 +275,11 @@
               RenderText {#text} at (0,-45) size 4x106
                 text run at (0,-45) width 4: "]"
           RenderMathMLOperator {mo} at (95,3) size 11x73
-            RenderBlock (anonymous) at (0,0) size 7x16
+            RenderBlock (anonymous) at (0,0) size 7x17
               RenderText {#text} at (0,-45) size 7x106
                 text run at (0,-45) width 7: "\x{2308}"
           RenderMathMLOperator {mo} at (106,3) size 11x73
-            RenderBlock (anonymous) at (0,0) size 7x16
+            RenderBlock (anonymous) at (0,0) size 7x17
               RenderText {#text} at (0,-45) size 7x106
                 text run at (0,-45) width 7: "\x{2309}"
           RenderMathMLOperator {mo} at (117,3) size 11x73
@@ -295,15 +295,15 @@
               RenderText {#text} at (0,-44) size 11x106
                 text run at (0,-44) width 11: "\x{222B}"
           RenderMathMLOperator {mo} at (155,3) size 9x73
-            RenderBlock (anonymous) at (0,0) size 4x16
+            RenderBlock (anonymous) at (0,0) size 4x17
               RenderText {#text} at (0,-45) size 4x106
                 text run at (0,-45) width 4: "|"
           RenderMathMLOperator {mo} at (163,2) size 7x43
-            RenderBlock (anonymous) at (0,0) size 6x16
+            RenderBlock (anonymous) at (0,0) size 6x17
               RenderText {#text} at (0,-45) size 6x106
                 text run at (0,-45) width 6: "\x{2016}"
           RenderMathMLOperator {mo} at (169,2) size 16x43
-            RenderBlock (anonymous) at (0,0) size 8x16
+            RenderBlock (anonymous) at (0,0) size 8x17
               RenderText {#text} at (0,-45) size 8x106
                 text run at (0,-45) width 8: "\x{2225}"
           RenderMathMLSpace {mspace} at (184,3) size 0x42