with a couple of small nits

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composition/merge_proposal.md line 7 at r2 (raw file):

Addisu Taddese  `<addisu@openrobotics.org>`
Steve Peters `<scpeters@openrobotics.org>`
* **Status**: Draft

nit Should we replace "Draft" with "Accepted" / "Implemented"?

composition/merge_proposal.md line 32 at r2 (raw file):

while maintaining the encapsulation provided by SDFormat 1.8.
The cost of this feature is that users must take care to avoid name collisions
between the entities of the models to be merged.

nit Can we provide mention of "likeness" to Python? e.g.

It may be helpful to image this as Python module imports.
With a normal include, a model include is similar to an import such as
`import my_model`. If you rename, then it is like `import my_model as renamed_model`.
With a merge include, it's effectively the same as `from my_model import *`.

(from slides on Thurs)

composition/merge_proposal.md line 176 at r2 (raw file):

The following is an abridged version of a Clearpath Husky skid-steer with
sensors mounted on a pan-tilt gimbal used in the DARPA Subterranean Challenge
([MARBLE HUSKY SENSOR CONFIG 3](https://app.ignitionrobotics.org/OpenRobotics/fuel/models/MARBLE_HUSKY_SENSOR_CONFIG_3)):

nit Can you ensure that this is pinned to particular version / revision? e.g.
https://app.gazebosim.org/OpenRobotics/fuel/models/MARBLE_HUSKY_SENSOR_CONFIG_3/10

composition/merge_proposal.md line 428 at r2 (raw file):

~~~

## Appendix

nit Should we put "(Unused)" as the body text here?

Reviewable status: all files reviewed, 1 unresolved discussion (waiting on @azeey and @EricCousineau-TRI)

composition/merge_proposal.md line 7 at r2 (raw file):

Done

composition/merge_proposal.md line 32 at r2 (raw file):

I paraphrased this slightly in 6c9c8d8

composition/merge_proposal.md line 176 at r2 (raw file):

Done

composition/merge_proposal.md line 428 at r2 (raw file):

Done

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