Merge pull request #426 from ericdill/docs-suggestions

Docs suggestions

Author: minrk

docs/kernels.rst

@@ -8,7 +8,7 @@ A 'kernel' is a program that runs and introspects the user's code. IPython
 includes a kernel for Python code, and people have written kernels for
 `several other languages <https://github.com/jupyter/jupyter/wiki/Jupyter-kernels>`_.
 
-When Jupyter starts a kernel, it passes it a connection file. This specifies
+At kernel startup, Jupyter passes the kernel a connection file. This specifies
 how to set up communications with the frontend.
 
 There are two options for writing a kernel:
@@ -143,7 +143,7 @@ JSON serialised dictionary containing the following keys and values:
   These will be added to the current environment variables before the kernel is
   started.
 - **metadata** (optional): A dictionary of additional attributes about this
-  kernel; used by clients to aid clients in kernel selection. Metadata added
+  kernel; used by clients to aid in kernel selection. Metadata added
   here should be namespaced for the tool reading and writing that metadata.
 
 For example, the kernel.json file for IPython looks like this::