--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/tests/test-fastannotate-diffopts.t	Mon Jul 30 22:50:00 2018 -0400
@@ -0,0 +1,33 @@
+  $ cat >> $HGRCPATH << EOF
+  > [extensions]
+  > fastannotate=
+  > EOF
+
+  $ hg init repo
+  $ cd repo
+
+changes to whitespaces
+
+  $ cat >> a << EOF
+  > 1
+  > 
+  >  
+  >  2
+  > EOF
+  $ hg commit -qAm '1'
+  $ cat > a << EOF
+  >  1
+  > 
+  > 2
+  > 
+  > 
+  > 3
+  > EOF
+  $ hg commit -m 2
+  $ hg fastannotate -wB a
+  0:  1
+  0: 
+  1: 2
+  0: 
+  1: 
+  1: 3