Fix syntax errors in docstring code blocks

- Fix incorrect import statements: change 'import urllib3 import make_headers' to 'from urllib3.util import make_headers'
- Remove extra blank lines in docstrings for proper Sphinx rendering

Author: jhamon

pinecone/pinecone.py

@@ -167,7 +167,7 @@ def __init__(
         .. code-block:: python
 
             from pinecone import Pinecone
-            import urllib3 import make_headers
+            from urllib3.util import make_headers
 
             pc = Pinecone(
                 api_key='YOUR_API_KEY',
@@ -177,8 +177,6 @@ def __init__(
 
             pc.list_indexes()
 
-
-
         **Using proxies with self-signed certificates**
 
         By default the Pinecone Python client will perform SSL certificate verification
@@ -189,7 +187,7 @@ def __init__(
         .. code-block:: python
 
             from pinecone import Pinecone
-            import urllib3 import make_headers
+            from urllib3.util import make_headers
 
             pc = Pinecone(
                 api_key='YOUR_API_KEY',
@@ -200,8 +198,6 @@ def __init__(
 
             pc.list_indexes()
 
-
-
         **Disabling SSL verification**
 
         If you would like to disable SSL verification, you can pass the ``ssl_verify``
@@ -210,7 +206,7 @@ def __init__(
         .. code-block:: python
 
             from pinecone import Pinecone
-            import urllib3 import make_headers
+            from urllib3.util import make_headers
 
             pc = Pinecone(
                 api_key='YOUR_API_KEY',
@@ -222,7 +218,6 @@ def __init__(
 
             pc.list_indexes()
 
-
         """
         for deprecated_kwarg in {"config", "openapi_config", "index_api"}:
             if deprecated_kwarg in kwargs: