[css-text-4] Loosen requirement about balancing not affecting the lin…

…e count #10186

css-text-4/Overview.bs

@@ -5530,10 +5530,15 @@ Selecting How to Wrap: the 'text-wrap-style' property</h3>
  Line breaks are chosen to balance
  the remaining (empty) space in each line box,
  if better balance than ''text-wrap-style/auto'' is possible.
- This must not change the number of line boxes
+ This should avoid changing--
+ and in the case of 5 or fewer lines must not change--
+ the number of line boxes
  the block would contain
  if 'text-wrap' were set to ''text-wrap-style/auto''.
 
+ Note: The height of the line boxes may nevertheless change,
+ due to changes in which content appears together on one line.
+
  <wpt>
  white-space/text-wrap-balance-001.html
  white-space/text-wrap-balance-002.html
@@ -13115,6 +13120,9 @@ Changes</h2>
  Significant changes since the <a href="https://www.w3.org/TR/2024/WD-css-text-4-20240219/">19 February 2024 Working Draft</a> include:
  * Renamed the 'text-spacing-trim' value <css>trim-auto</css> to ''trim-both''.
  (<a href="https://github.com/w3c/csswg-drafts/issues/10161">Issue 10161</a>)
+ * Loosened requirement about not changing lines for ''text-wrap-style: balance''
+ for cases with large numbers of lines.
+ (<a href="https://github.com/w3c/csswg-drafts/issues/10186">Issue 10186</a>)
 
  Significant changes since the <a href="https://www.w3.org/TR/2023/WD-css-text-4-20231020/">20 October 2023 Working Draft</a> include:
  * Restored accidentally deleted “and each line after a [=forced line break=]”