Format links in simulation docs (#3596)
Format links in simulation docs (#3596)

Some links on the site are not rendering well for the [simulation docs](https://quantumai.google/cirq/simulation):

![image](https://user-images.githubusercontent.com/32416820/101688527-26e52e00-3a3a-11eb-9052-3ee7be5e29ba.png)

This PR fixes this by changing to one tick for inline code instead of two which renders well for other docs (e.g., [noise](https://quantumai.google/cirq/noise)).  Also removes extra Cirq install and fixes small typo.

balopat/Cirq,balopat/Cirq,quantumlib/Cirq,quantumlib/Cirq,balopat/Cirq,quantumlib/Cirq,quantumlib/Cirq,quantumlib/Cirq