Assuming that the rendered code is like this
<td class="diff-code diff-code-insert" style="user-select: auto;">
<span class="diff-code-edit">
<span class="token function">onU</span>
</span>
<span class="token function">pdat</span>
<span class="diff-code-edit">
<span class="token function">e</span>
</span>
</td>
When I use ctrl+f to search for "onUpdate" on the webpage, I cannot find the above one because the display of .diff-code-edit is inline-block.
I think display: inline-block should be changed to display: inline.