Merge pull request #664 from python-cmd2/pointer_bug

Fixed issue where pointer to bytearray was being returned instead of copied bytes

Author: kmvanbrunt

cmd2/utils.py

@@ -325,7 +325,7 @@ def getvalue(self) -> str:
 
     def getbytes(self) -> bytes:
         """Get the internal contents as bytes"""
-        return self.buffer.byte_buf
+        return bytes(self.buffer.byte_buf)
 
     def read(self) -> str:
         """Read from the internal contents as a str and then clear them out"""
@@ -341,7 +341,7 @@ def readbytes(self) -> bytes:
 
     def clear(self) -> None:
         """Clear the internal contents"""
-        self.buffer.byte_buf = bytearray()
+        self.buffer.byte_buf.clear()
 
     def isatty(self) -> bool:
         """StdSim only considered an interactive stream if `echo` is True and `inner_stream` is a tty."""