Format, fix an edgecase

lib/kanjivg_parser.dart

@@ -78,8 +78,7 @@ class KanjiStrokeNumber {
   KanjiStrokeNumber(this.num, this.position);
 
   @override
-  String toString() =>
-      'KanjiStrokeNumber(number: $num, position: $position)';
+  String toString() => 'KanjiStrokeNumber(number: $num, position: $position)';
 }
 
 /// Contents of a `<path>` element in the KanjiVG SVG files

lib/svg_parser.dart

@@ -32,7 +32,9 @@ const _commands = {
 // const _uppercaseCommands = {'M', 'Z', 'L', 'H', 'V', 'C', 'S', 'Q', 'T', 'A'};
 
 final _commandPattern = RegExp("(?=[${_commands.join('')}])");
-final _floatPattern = RegExp(r"^[-+]?(?:[0-9]+\.?[0-9]*|[0-9]*\.?[0-9]+)(?:[eE][-+]?[0-9]+)?");
+final _floatPattern = RegExp(
+  r"^[-+]?(?:[0-9]+\.?[0-9]*|[0-9]*\.?[0-9]+)(?:[eE][-+]?[0-9]+)?",
+);
 
 class ParserResult<T> {
   final T value;
@@ -253,8 +255,10 @@ Path parsePath(String pathdef) {
       segments.add(Move(to: currentPos));
       startPos = currentPos;
     } else if (command == "Z") {
-      // TODO Throw error if not available:
-      segments.add(Close(start: currentPos, end: startPos!));
+      if (startPos == null) {
+        throw InvalidPathError("Path closed without a starting position.");
+      }
+      segments.add(Close(start: currentPos, end: startPos));
       currentPos = startPos;
     } else if (command == "L") {
       Point pos = token.args[0] as Point;