Fixed bad operand type runtime error

Due to addition of new line, the assignment was incomplete which resulted in error during execution. Fixed by enclosing the whole declaration  into parenthesis 

ref : https://stackoverflow.com/a/29880192

Author: neutrinoguy

Reconnoitre/lib/file_helper.py

@@ -121,8 +121,8 @@ def write_recommendations(results, ip_address, outputdir):
                 for port in ports:
                     port = port.split("/")[0]
 
-                    description = "[*] "
-                    + j["services"][service]["description"]
+                    description = ("[*] "
+                    + j["services"][service]["description"])
                     print(description % {"ip": ip_address, "port": port})
                     f.write((description + "\n") %
                             {"ip": ip_address, "port": port})