fix equals() - 0.15

src/main/kotlin/blitz/str/Escape.kt

@@ -0,0 +1,28 @@
+package blitz.str
+
+fun unescape(str: String): String {
+    val out = StringBuilder()
+    var escaped = false
+
+    for (char in str) {
+        if (escaped) {
+            escaped = false
+            val e = when (char) {
+                'n' -> '\n'
+                'r' -> '\r'
+                't' -> '\t'
+                '\\' -> '\\'
+                '"' -> '"'
+                '\'' -> '\''
+                else -> error("Unexpected character '$char'")
+            }
+            out.append(e)
+        } else if (char == '\\') {
+            escaped = true
+        } else {
+            out.append(char)
+        }
+    }
+
+    return out.toString()
+}