Add escape code for ESC \e

src/exact_value.cpp

@@ -407,10 +407,6 @@ ExactValue exact_unary_operator_value(TokenKind op, ExactValue v, i32 precision,
 		if (is_unsigned) {
 			i = i & unsigned_integer_maxs[precision/8];
 		}
-		// if (0 < precision && precision < 64) {
-		// 	i = i & ~(-1ll << precision);
-		// }
-
 		return exact_value_i64(i);
 	}
 

src/string.cpp

@@ -451,6 +451,7 @@ bool unquote_char(String s, u8 quote, Rune *rune, bool *multiple_bytes, String *
 
 	case 'a':  *rune = '\a'; break;
 	case 'b':  *rune = '\b'; break;
+	case 'e':  *rune = 0x1b; break;
 	case 'f':  *rune = '\f'; break;
 	case 'n':  *rune = '\n'; break;
 	case 'r':  *rune = '\r'; break;