Fix README.md command consistency

The ./configure command in README.md's Building Documentation section was missing the $ prefix. Add the prefix to be consistent with other commands in the document.
rust-lang · Jun 30, 2016 · b18ed5b · b18ed5b
1 parent c2b56fb
commit b18ed5b
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/README.md b/README.md
@@ -119,7 +119,7 @@ $ make && make install
 If you’d like to build the documentation, it’s almost the same:
 
 ```sh
-./configure
+$ ./configure
 $ make docs
 ```