Added a tilde in the hexdiff output to show when the previous displayed line repeats.

src/binwalk/modules/hexdiff.py

@@ -17,6 +17,7 @@ class HexDiff(Module):
     DEFAULT_BLOCK_SIZE = 16
 
     SKIPPED_LINE = "*"
+    SAME_DIFFERENCE = "~"
     CUSTOM_DISPLAY_FORMAT = "0x%.8X    %s"
 
     TITLE = "Binary Diffing"
@@ -113,6 +114,7 @@ class HexDiff(Module):
         return (hexbyte, asciibyte)
 
     def diff_files(self, target_files):
+        last_raw_line = None
         last_line = None
         loop_count = 0
         sep_count = 0
@@ -126,6 +128,7 @@ class HexDiff(Module):
 
         while True:
             line = ""
+            current_raw_line = ""
             done_files = 0
             block_data = {}
             seperator = self.SEPERATORS[sep_count % 2]
@@ -159,20 +162,30 @@ class HexDiff(Module):
                     break
 
                 if fp != target_files[-1]:
+                    # Need to keep a copy of the line data without the seperator, since the sep changes
+                    # every other line. This allows us to compare one raw line to a previous raw line to
+                    # see if they are the same.
+                    current_raw_line += line
                     line += " %s " % seperator
 
             offset = fp.offset + (self.block * loop_count)
 
-            if not self._color_filter(line):
+            if current_raw_line == last_raw_line:
+                display = line = self.SAME_DIFFERENCE
+            elif not self._color_filter(line):
                 display = line = self.SKIPPED_LINE
             else:
                 display = self.CUSTOM_DISPLAY_FORMAT % (offset, line)
                 sep_count += 1
 
-            if line != self.SKIPPED_LINE or last_line != line:
+            if (line not in [self.SKIPPED_LINE, self.SAME_DIFFERENCE] or
+                    (last_line != line and
+                        (last_line not in [self.SKIPPED_LINE, self.SAME_DIFFERENCE] or
+                         line not in [self.SKIPPED_LINE, self.SAME_DIFFERENCE]))):
                 self.result(offset=offset, description=line, display=display)
 
             last_line = line
+            last_raw_line = current_raw_line
             loop_count += 1
             self.status.completed += self.block