patch 7.4.1027
Problem:    No support for binary numbers.
Solution:   Add "bin" to nrformats. (Jason Schulz)
diff --git a/src/testdir/test57.in b/src/testdir/test57.in
index 8d972e4..0bb95ad 100644
--- a/src/testdir/test57.in
+++ b/src/testdir/test57.in
@@ -30,6 +30,8 @@
 :/^t25:/+1,/^t26/-1sort/\d\d/rn
 :/^t26:/+1,/^t27/-1sort/\d\d/rx
 :/^t27:/+1,/^t28/-1sort no
+:/^t28:/+1,/^t29/-1sort b
+:/^t29:/+1,/^t30/-1sort b
 :/^t01:/,$wq! test.out
 ENDTEST
 
@@ -494,7 +496,38 @@
 b322b
 b321
 b321b
+t28: binary
 
 
-t28: done
+0b111000
+0b101100
+0b101001
+0b101001
+0b101000
+0b000000
+0b001000
+0b010000
+0b101000
+0b100000
+0b101010
+0b100010
+0b100100
+0b100010
+t29: binary with leading characters
 
+
+0b100010
+0b010000
+ 0b101001
+b0b101100
+0b100010
+ 0b100100
+a0b001000
+0b101000
+0b101000
+a0b101001
+ab0b100000
+0b101010
+0b000000
+b0b111000
+t30: done