create mode 100644 lib/std/io/BufferedReader.zig
 create mode 100644 lib/std/io/CountingReader.zig
 delete mode 100644 lib/std/io/FixedBufferStream.zig
 delete mode 100644 lib/std/io/Reader/test.zig
 delete mode 100644 lib/std/io/buffered_reader.zig
 delete mode 100644 lib/std/io/counting_reader.zig
 delete mode 100644 lib/std/io/seekable_stream.zig
 delete mode 100644 lib/std/io/stream_source.zig