now cleans pipe correctly

test/testfiles/test01.md

@@ -0,0 +1 @@
+# the 1st testfile

test/testfiles/test02.md

@@ -0,0 +1 @@
+# the second testfile

test/testfiles/test03.md

@@ -0,0 +1 @@
+# the third testfile

test/testfiles/test04.md

@@ -0,0 +1 @@
+# the fourth testfile

test/testfiles/test05.md

@@ -0,0 +1 @@
+# the fifth testfile

test/testfiles/test06.md

@@ -0,0 +1 @@
+# the sixth testfile

test/testfiles/test07.md

@@ -0,0 +1 @@
+# the seventh testfile

test/testfiles/test08.md

@@ -0,0 +1 @@
+# the eighth testfile

test/testfiles/test09.md

@@ -0,0 +1 @@
+# the nineth testfile

test/testfiles/test10.md

@@ -0,0 +1 @@
+# the tenth testfile

test/testfiles/test11.md

@@ -0,0 +1 @@
+# the eleventh testfile

test/testfiles/test12.md

@@ -0,0 +1 @@
+# the twelveth testfile

test/testfiles/test13.md

@@ -0,0 +1 @@
+# the second testfile

test/testfiles/test14.md

@@ -0,0 +1 @@
+# the second testfile

test/testfiles/test15.md

@@ -0,0 +1 @@
+# the second testfile

test/testfiles/test16.md

@@ -0,0 +1 @@
+# the second testfile

test/testfiles/test17.md

@@ -0,0 +1 @@
+# the second testfile

test/testfiles/test18.md

@@ -0,0 +1 @@
+# the 18th testfile