func (w *SnowballWord) RemoveLastNRunes(n int) {
	w.RS = w.RS[:len(w.RS)-n]
	w.resetR1R2()
}
Remove the last `n` runes from the SnowballWord.
package snowballword
import (
	"fmt"
)
type SnowballWord struct {
	RS []rune
	R1start int
	R2start int
	RVstart int
}
func New(in string) (word *SnowballWord) {
	word = &SnowballWord{RS: []rune(in)}
	word.R1start = len(word.RS)
	word.R2start = len(word.RS)
	word.RVstart = len(word.RS)
	return
}
func (w *SnowballWord) ReplaceSuffix(suffix, replacement string, force bool) bool {
	var (
		doReplacement bool
		suffixRunes   []rune
	)
	if force {
		doReplacement = true
		suffixRunes = []rune(suffix)
	} else {
		var foundSuffix string
		foundSuffix, suffixRunes = w.FirstSuffix(suffix)
		if foundSuffix == suffix {
			doReplacement = true
		}
	}
	if doReplacement == false {
		return false
	}
	w.ReplaceSuffixRunes(suffixRunes, []rune(replacement), true)
	return true
}