Update README.md

fixed formatting

Author: ajtao

examples/README.md

@@ -1,12 +1,27 @@
 Examples of using runx.
 Please create a .runx file from .runx_example first.
 
-Interactive:
-  > python -m runx.runx mnist.yml -i -n   -> dry run
-  > python -m runx.runx mnist.yml -i      -> real run
+# Interactive
 
-Batch runs:
-  > python -m runx.runx mnist.yml -n      -> dry run
-  > python -m runx.runx mnist.yml         -> real run
+dry run:
+```bash
+  > python -m runx.runx mnist.yml -i -n
+```
 
-Can also try imgnet.yml.
+real run:
+```bash
+  > python -m runx.runx mnist.yml -i
+```
+
+# Batch runs:
+dry run:
+```bash
+  > python -m runx.runx mnist.yml -n
+```
+
+real run:
+```bash
+  > python -m runx.runx mnist.yml
+```
+
+Can also try imgnet.yml.