From 3f725c75b1327059759051845db567cf66434e34 Mon Sep 17 00:00:00 2001
From: Ilya Puchka <ilyapuchka@gmail.com>
Date: Thu, 27 Sep 2018 09:54:51 +0100
Subject: [PATCH] do not use force unwrap

---
 Sources/Tokenizer.swift | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/Sources/Tokenizer.swift b/Sources/Tokenizer.swift
index 062388ac..cd93cb8c 100644
--- a/Sources/Tokenizer.swift
+++ b/Sources/Tokenizer.swift
@@ -18,11 +18,11 @@ extension String {
         } else if specialCharacters.contains(word) {
           components[components.count-1] += word
         } else if word != "(" && word.hasPrefix("(") || word != ")" && word.hasPrefix(")") {
-          components.append(String(word.first!))
+          components.append(String(word[0]))
           appendWord(String(word.dropFirst()))
         } else if word != "(" && word.hasSuffix("(") || word != ")" && word.hasSuffix(")") {
           appendWord(String(word.dropLast()))
-          components.append(String(word.last!))
+          components.append(String(word.suffix(1)))
         } else {
           components.append(word)
         }