Analyzer warnings from doc references.

Author: lrhn

pkgs/characters/lib/src/grapheme_clusters/breaks.dart

@@ -578,7 +578,7 @@ int nextBreak(String text, int start, int end, int index) {
 /// or backwards from known breaks.
 ///
 /// That character is always one of [categoryOtherIndicConsonant],
-/// [categoryPictorgraphic] or [categoryRegionalIndicator], the only
+/// [categoryPictographic] or [categoryRegionalIndicator], the only
 /// characters where knowing whether to break before them depends on
 /// more than the single prior character.
 bool _lookaheadSimple(String text, int start, int cursor, int backState) {

pkgs/characters/lib/src/grapheme_clusters/constants.dart

@@ -194,7 +194,7 @@ const stateCExt = idStateCExt * scaleState;
 const StateId idStateCExZ = 0x17 as StateId;
 const stateCExZ = idStateCExZ * scaleState;
 
-/// Seen [RegionalIndicator] only.
+/// Seen single RegionalIndicator only.
 const StateId idStateCReg = 0x18 as StateId;
 const stateCReg = idStateCReg * scaleState;