patch 7.4.1027
Problem:    No support for binary numbers.
Solution:   Add "bin" to nrformats. (Jason Schulz)
diff --git a/src/testdir/test57.ok b/src/testdir/test57.ok
index aa3d373..2ac5e59 100644
--- a/src/testdir/test57.ok
+++ b/src/testdir/test57.ok
@@ -453,7 +453,38 @@
 b322b
 b321
 b321b
+t28: binary
 
 
-t28: done
+0b000000
+0b001000
+0b010000
+0b100000
+0b100010
+0b100010
+0b100100
+0b101000
+0b101000
+0b101001
+0b101001
+0b101010
+0b101100
+0b111000
+t29: binary with leading characters
 
+
+0b000000
+a0b001000
+0b010000
+ab0b100000
+0b100010
+0b100010
+ 0b100100
+0b101000
+0b101000
+ 0b101001
+a0b101001
+0b101010
+b0b101100
+b0b111000
+t30: done