Fix character escaping in tests

pwnlib/tubes/tube.py

@@ -1115,21 +1115,21 @@ def upload_manually(self, data, target_path = './payload', prompt = b'$', chunk_
         >>> l = listen()
         >>> l.spawn_process('/bin/sh')
         >>> r = remote('127.0.0.1', l.lport)
-        >>> r.upload_manually(b'some\xca\xfedata\n', prompt=b'', chmod_flags='')
+        >>> r.upload_manually(b'some\\xca\\xfedata\\n', prompt=b'', chmod_flags='')
         >>> r.sendline(b'cat ./payload')
         >>> r.recvline()
-        b'some\xca\xfedata\n'
+        b'some\\xca\\xfedata\\n'
 
         >>> r.upload_manually(cyclic(0x1000), target_path='./cyclic_pattern', prompt=b'', chunk_size=0x10, compression='gzip')
         >>> r.sendline(b'sha256sum ./cyclic_pattern')
         >>> r.recvlineS(keepends=False).startswith(sha256sumhex(cyclic(0x1000)))
         True
 
-        >>> blob = ELF.from_assembly(shellcraft.echo('Hello world!\n') + shellcraft.exit(0))
+        >>> blob = ELF.from_assembly(shellcraft.echo('Hello world!\\n') + shellcraft.exit(0))
         >>> r.upload_manually(blob.data, prompt=b'')
         >>> r.sendline(b'./payload')
         >>> r.recvline()
-        b'Hello world!\n'
+        b'Hello world!\\n'
         >>> r.close()
         >>> l.close()
         """