Fixed hexdiff header formatting bug

src/binwalk/modules/entropy.py

@@ -34,7 +34,7 @@ class Entropy(Module):
                    kwargs={'save_plot' : True},
                    description='Save plot as a PNG'),
             Option(short='N',
-                   long='plot',
+                   long='nplot',
                    kwargs={'do_plot' : False},
                    description='Do not generate an entropy plot graph'),
             Option(short='Q',

src/binwalk/modules/hexdiff.py

@@ -193,7 +193,7 @@ class HexDiff(Module):
             file_count = 1
         else:
             file_count = len(self.hex_target_files)
-        self.HEADER_FORMAT = "OFFSET        " + ("%%-%ds   " % header_width) * file_count
+        self.HEADER_FORMAT = "OFFSET      " + (("%%-%ds   " % header_width) * file_count) + "\n"
 
         # Build the header argument list
         self.HEADER = [fp.name for fp in self.hex_target_files]