[DOCS] Fix tutorial (#2724)

* fix docments

* delete e

docs/install/from_source.rst

@@ -162,7 +162,7 @@ Python dependencies
 
    .. code:: bash
 
-       pip install --user numpy decorator
+       pip install --user numpy decorator attrs
 
    * If you want to use RPC Tracker
 

tutorials/relay_quick_start.py

 """
 .. _tutorial-relay-quick-start:
+
 Quick Start Tutorial for Compiling Deep Learning Models
-======================================================e
+======================================================
 **Author**: `Yao Wang <https://github.com/kevinthesun>`_, `Truman Tian <https://github.com/SiNZeRo>`_
 
 This example shows how to build a neural network with Relay python frontend and