added option to disable final filter

The option marker was chosen as "-x" here.
Alternatives might be "-X" or "-*".

tests/t1300-ls.sh

@@ -54,7 +54,34 @@ TODO: 3 of 3 tasks shown from $HOME/todo.txt
 EOF
 
 #
-# check the  p command line option
+# check the x command line option
+#
+TEST_TODO3_=todo3.cfg
+sed -e "s%^.*export TODOTXT_FINAL_FILTER=.*$%export TODOTXT_FINAL_FILTER=\"grep -v xxx\"%" "${TEST_TODO_}" > "${TEST_TODO3_}"
+
+cat > todo.txt <<EOF
+foo
+bar xxx
+baz
+EOF
+
+test_todo_session 'final filter suppression' <<EOF
+>>> todo.sh -d "$TEST_TODO3_" ls
+3 baz
+1 foo
+--
+TODO: 2 of 3 tasks shown from $HOME/todo.txt
+
+>>> todo.sh -d "$TEST_TODO3_" -x ls
+2 bar xxx
+3 baz
+1 foo
+--
+TODO: 3 of 3 tasks shown from $HOME/todo.txt
+EOF
+
+#
+# check the p command line option
 #
 cat > todo.txt <<EOF
 (A) @con01 +prj01 -- Some project 01 task, pri A

todo.sh

@@ -196,6 +196,8 @@ help()
             Extra verbose mode prints some debugging information
         -V
             Displays version, license and credits
+        -x
+            Disables TODOTXT_FINAL_FILTER
 
 
       Environment variables:
@@ -256,7 +258,7 @@ archive()
 
 
 # == PROCESS OPTIONS ==
-while getopts ":fhpnatvV+@Pd:" Option
+while getopts ":fhpnatvVx+@Pd:" Option
 do
   case $Option in
     '@' )
@@ -334,6 +336,9 @@ do
     V )
         version
         ;;
+    x )
+        TODOTXT_DISABLE_FILTER=1
+        ;;
   esac
 done
 shift $(($OPTIND - 1))
@@ -497,6 +502,9 @@ _list() {
 
     ## Number the file, then run the filter command,
     ## then sort and mangle output some more
+    if [[ $TODOTXT_DISABLE_FILTER = 1 ]]; then
+        TODOTXT_FINAL_FILTER="cat"
+    fi
     items=$(
         sed = "$src"                                            \
         | sed "N; s/^/     /; s/ *\(.\{$PADDING,\}\)\n/\1 /"    \