sed: support GNU-like '\t' escape in substitutions

2 files changed, 4 insertions, 1 deletions

diff --git a/testsuite/README b/testsuite/README
index 377f20ef8..a44846dbb 100644
--- a/testsuite/README
+++ b/testsuite/README
@@ -4,7 +4,9 @@ Update: doesn't work as described. Try "make check" from parent dir...
 To run the test suite, change to this directory and run "./runtest".  It will
 run all of the test cases, and list those with unexpected outcomes.  Adding the
 -v option will cause it to show expected outcomes as well.  To only run the test
-cases for particular applets, specify them as parameters to runtest.
+cases for particular applets:
+
+./runtest <applet1> <applet2>...
 
 The test cases for an applet reside in the subdirectory of the applet name.  The
 name of the test case should be the assertion that is tested.  The test case
diff --git a/testsuite/sed.tests b/testsuite/sed.tests
index a054de6d7..7471ed5fc 100755
--- a/testsuite/sed.tests
+++ b/testsuite/sed.tests
@@ -57,6 +57,7 @@ testing "sed s arbitrary delimiter" "sed -e 's woo boing '" "boing\n" "" "woo\n"
 testing "sed s chains" "sed -e s/foo/bar/ -e s/bar/baz/" "baz\n" "" "foo\n"
 testing "sed s chains2" "sed -e s/foo/bar/ -e s/baz/nee/" "bar\n" "" "foo\n"
 testing "sed s [delimiter]" "sed -e 's@[@]@@'" "onetwo" "" "one@two"
+testing "sed s with \\t (GNU ext)" "sed 's/\t/ /'" "one two" "" "one\ttwo"
 
 # branch
 testing "sed b (branch)" "sed -e 'b one;p;: one'" "foo\n" "" "foo\n"