Update pretty printing.

See rust-lang/rust#19964.
docopt · Jan 27, 2015 · 73c655d · 73c655d
1 parent 96fc60b
commit 73c655d
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/README.md b/README.md
@@ -205,7 +205,7 @@ expanding all macros. Say you wrote the above example for `Usage: add <x> <y>`
 into a file called `add.rs`. Then running:
 
 ```bash
-rustc -L path/containing/docopt/lib --pretty expanded add.rs
+rustc -L path/containing/docopt/lib -Z unstable-options --pretty=expanded add.rs
 ```
 
 Will show all macros expanded. In the generated code, you should be able to