py3: add () to print statements

It's a function call in 3.x and redundant parentheses around an
expression on 2.x. This works fine as long as all prints have just a
single argument. One print statement with two arguments was changed to
use % formatting instead.

smem

@@ -464,12 +464,12 @@ def showsystem():
 
 def showfields(fields, f):
     if type(f) in (list, set):
-        print "unknown fields:", " ".join(f)
+        print("unknown fields: " + " ".join(f))
     else:
-        print "unknown field", f
-    print "known fields:"
-    for l in sorted(fields.keys()):
-        print "%-8s %s" % (l, fields[l][-1])
+        print("unknown field %s" % f)
+    print("known fields:")
+    for l in sorted(fields):
+        print("%-8s %s" % (l, fields[l][-1]))
 
 def autosize(columns, fields, rows):
     colsizes = {}
@@ -559,10 +559,10 @@ def showtable(rows, fields, columns, sort):
         return
 
     if not options.no_header:
-        print header
+        print(header)
 
     for k,r in l:
-        print format % tuple([f(v) for f,v in zip(formatter, r)])
+        print(format % tuple([f(v) for f,v in zip(formatter, r)]))
 
     if options.totals:
         # totals
@@ -574,8 +574,8 @@ def showtable(rows, fields, columns, sort):
             else:
                 t.append("")
 
-        print "-" * len(header)
-        print format % tuple([f(v) for f,v in zip(formatter, t)])
+        print("-" * len(header))
+        print(format % tuple([f(v) for f,v in zip(formatter, t)]))
 
 def showpie(l, sort):
     try: