format readme

README.md

@@ -7,13 +7,13 @@ rust-rocksdb
 
 ### running
 1. get rocksdb
-  ```
+```
-  git clone https://github.com/facebook/rocksdb
+git clone https://github.com/facebook/rocksdb
-  cd rocksdb
+cd rocksdb
-  make shared_lib
+make shared_lib
-  ```
+```
 2. run tests
-  ```
+```
-  LD_PRELOAD=/path/to/rocksdb/librocksdb.so cargo test
+LD_PRELOAD=/path/to/rocksdb/librocksdb.so cargo test
-  ```
+```
 3. enjoy (as much as you can with such a poor current library!  stay tuned!)