diff -uNr patchutils_git/doc/patchutils.xml patchutils_new/doc/patchutils.xml
--- patchutils_git/doc/patchutils.xml	2008-06-18 12:56:53.000000000 +0400
+++ patchutils_new/doc/patchutils.xml	2008-06-19 15:29:00.000000000 +0400
@@ -549,6 +549,8 @@
 	  <arg choice="opt">-X <replaceable>FILE</replaceable></arg>
 	  <arg choice="opt">--verbose</arg>
 	  <arg choice="opt">-v</arg>
+	  <arg choice="opt">--clean</arg>
+	  <arg choice="opt">-c</arg>
 	  <arg choice="opt">-z</arg>
 	  <group choice="opt">
 	    <arg>-# <replaceable>RANGE</replaceable></arg>
@@ -761,6 +763,15 @@
 	  </varlistentry>
 
 	  <varlistentry>
+	    <term><option>-c</option>, <option>--clean</option></term>
+	    <listitem>
+	      <para>Always remove all non-diff lines 
+	        from the output. Even when excluding
+	        a filename pattern.</para>
+	    </listitem>
+	  </varlistentry>
+
+	  <varlistentry>
 	    <term><option>-z</option></term>
 	    <listitem>
 	      <para>Decompress files with extensions .gz and .bz2.</para>
diff -uNr patchutils_git/src/filterdiff.c patchutils_new/src/filterdiff.c
--- patchutils_git/src/filterdiff.c	2008-06-18 12:56:53.000000000 +0400
+++ patchutils_new/src/filterdiff.c	2008-06-19 15:35:00.000000000 +0400
@@ -77,6 +77,7 @@
 } mode;
 static regex_t *regex = NULL;
 static size_t num_regex = 0;
+static int clean_comments = 0;
 static int numbering = 0;
 static int annotating = 0;
 static int ignore_components = 0;
@@ -902,8 +903,9 @@
 			}
 
 			/* Show non-diff lines if excluding, or if
-			 * in verbose mode. */
-			if (mode == mode_filter && (pat_exclude || verbose))
+			 * in verbose mode, and if --clean isn't specified. */
+			if (mode == mode_filter && (pat_exclude || verbose)
+				&& !clean_comments)
 				fputs (line, stdout);
 
 			if (getline (&line, &linelen, f) == -1)
@@ -920,8 +922,9 @@
 
 		if (getline (&line, &linelen, f) == -1) {
 			/* Show non-diff lines if excluding, or if
-			 * in verbose mode. */
-			if (mode == mode_filter && (pat_exclude || verbose))
+			 * in verbose mode, and if --clean isn't specified. */
+			if (mode == mode_filter && (pat_exclude || verbose)
+				&& !clean_comments)
 				fputs (header[0], stdout);
 			free (names[0]);
 			goto eof;
@@ -930,8 +933,9 @@
 
 		if (strncmp (line, is_context ? "--- " : "+++ ", 4)) {
 			/* Show non-diff lines if excluding, or if
-			 * in verbose mode. */
-			if (mode == mode_filter && (pat_exclude || verbose))
+			 * in verbose mode, and if --clean isn't specified. */
+			if (mode == mode_filter && (pat_exclude || verbose)
+				&& !clean_comments)
 				fputs (header[0], stdout);
 			free (names[0]);
 			free (header[0]);
@@ -1030,6 +1034,8 @@
 "            show matching hunks or file-level diffs (grepdiff)\n"
 "  --remove-timestamps (filterdiff, grepdiff)\n"
 "            don't show timestamps from output (filterdiff, grepdiff)\n"
+"  -c, --clean (filterdiff)\n"
+"            remove all comments (non-diff lines) from output (filterdiff)\n"
 "  -z        decompress .gz and .bz2 files\n"
 "  -n        show line numbers (lsdiff, grepdiff)\n"
 "  --number-files (lsdiff, grepdiff)\n"
@@ -1256,10 +1262,11 @@
 			{"no-filename", 0, 0, 'h'},
 			{"empty-files-as-absent", 0, 0, 'E'},
 			{"number-files", 0, 0, 1000 + 'n'},
+			{"clean", 0, 0, 'c'},
 			{0, 0, 0, 0}
 		};
 		char *end;
-		int c = getopt_long (argc, argv, "vp:i:I:x:X:zns#:Ef:Hh",
+		int c = getopt_long (argc, argv, "vp:i:I:x:X:zns#:Ef:Hhc",
 				     long_options, NULL);
 		if (c == -1)
 			break;
@@ -1390,6 +1397,9 @@
 		case 1000 + 'r':
 			removing_timestamp = 1;
 			break;
+		case 'c':
+			clean_comments = 1;
+			break;
 		default:
 			syntax(1);
 		}
@@ -1420,6 +1430,11 @@
 		error (EXIT_FAILURE, 0, "--as-numbered-lines is "
 		       "inappropriate in this context");
 
+	if (mode == mode_filter &&
+	    verbose && clean_comments)
+		error (EXIT_FAILURE, 0, "can't use --verbose and "
+		       "--clean options simultaneously");
+
 	if (mode == mode_grep && !regex_file_specified) {
 		int err;