Fixed a typo and recommend a change for better clarity:

1-Original: file which contains details of the L2 environment to bring up (including the
Suggested: file that contains details of the L2 environment to bring up (including the (I changed "which" to "that" for better flow)

2-Original: is included to help document an demonstrate the usage of the
Suggested: is included to help document and demonstrate the usage of the (I fixed a small typo, change "an" to "and")