Fix inconsistent bonus points in exact match

Exact match would assign a different bonus point to the first character
when non-default --scheme was used.

Fix #3073

CHANGELOG.md

@@ -9,7 +9,7 @@ CHANGELOG
   # No need to bind 'double-click' to the same action
   fzf --bind 'enter:execute:less {}' # --bind 'double-click:execute:less {}'
   ```
-- Minor rendering improvements
+- Minor bug fixes and improvements
 
 0.35.1
 ------

src/algo/algo.go

@@ -617,7 +617,7 @@ func FuzzyMatchV2(caseSensitive bool, normalize bool, forward bool, input *util.
 func calculateScore(caseSensitive bool, normalize bool, text *util.Chars, pattern []rune, sidx int, eidx int, withPos bool) (int, *[]int) {
 	pidx, score, inGap, consecutive, firstBonus := 0, 0, false, 0, int16(0)
 	pos := posArray(withPos, len(pattern))
-	prevClass := charWhite
+	prevClass := initialCharClass
 	if sidx > 0 {
 		prevClass = charClassOf(text.Get(sidx - 1))
 	}