Highlight the words between curly braces

TextWithHighlights.kt

private fun getTextWithHighlights(text: String): CharSequence {
            // Initialize spannable string without any formatting
            val spannableString = SpannableStringBuilder(text)
            // Regex to find words between curly braces i.e {test}
            val regex = Regex("\\{(.*?)\\}")
            // List of index for the curly braces which needs to be removed after formatting
            val symbolsToRemoveIndices = mutableListOf<Int>()

            // iterate over all the words within curly braces
            regex.findAll(spannableString).forEach {
                // Set the color of the word
                spannableString.setSpan(
                    ForegroundColorSpan(
                        ContextCompat.getColor(
                            activity,
                            R.color.highlightColor
                        )
                    ),
                    it.range.first,
                    it.range.last + 1,
                    Spannable.SPAN_INCLUSIVE_EXCLUSIVE
                )
                // Set the font of the word
                spannableString.setSpan(
                    CustomTypefaceSpan(
                        "",
                        ResourcesCompat.getFont(
                            activity,
                            R.font.highlightFont
                        )),
                    it.range.first,
                    it.range.last + 1,
                    Spannable.SPAN_INCLUSIVE_EXCLUSIVE
                )
                // Save index of curly braces to the list to remove after formatting
                symbolsToRemoveIndices.add(it.range.first)
                symbolsToRemoveIndices.add(it.range.last)
            }
            // Remove all curcly braces
            symbolsToRemoveIndices.sortedDescending().forEach {
                spannableString.replace(
                    it, it + 1, ""
                )
            }
            return spannableString
        }