Merge remote-tracking branch 'origin/main' into HEAD

; Conflicts:
;	ROADMAP.md

GLOSSARY.md

@@ -48,20 +48,3 @@ _Avoid_: User dictionary (in the interface)
 A folder of Hunspell dictionaries you supply, used before the system's (an installed Language pack
 comes after it).
 _Avoid_: Custom dictionaries
-
-## Export
-
-**Strict export**:
-An export that writes nothing, and reports why, when the output would leave out a character or a
-picture the document contains.
-_Avoid_: Safe mode, validated export
-
-**Missing glyph**:
-A character the output draws that no face in the font fallback chain can draw, so it would appear
-as an empty box.
-_Avoid_: Tofu, box, notdef character
-
-**Missing picture**:
-A picture the document refers to that the output cannot include: its part is absent, its data
-cannot be decoded, its format is unsupported, or it is linked from outside the file.
-_Avoid_: Broken image, dropped image