[css-text-3][css-text-4] Clarify interaction of word-break: keep-all and hyphenation #12196
Description
The current definition of word-break: keep-all https://www.w3.org/TR/css-text-3/#valdef-word-break-keep-all
Breaking is forbidden within “words”: implicit soft wrap opportunities between typographic letter units (or other typographic character units belonging to the NU, AL, AI, or ID Unicode line breaking classes [UAX14]) are suppressed, i.e. breaks are prohibited between pairs of such characters (regardless of line-break settings other than anywhere) except where opportunities exist due to dictionary-based breaking.
It might be useful to clarify that the exception applies to hyphenation as well.