Update Repeat until success notebook

[beckykd]

closes #1138

copy over edits from learning repo made by @RoyElkabetz and myself

[qiskit-bot]

Thanks for contributing to Qiskit documentation!

Before your PR can be merged, it will first need to pass continuous integration tests and be reviewed. Sometimes the review process can be slow, so please be patient. Thanks! 🙌

[review-notebook-app]

Check out this pull request on 

See visual diffs & provide feedback on Jupyter Notebooks.

---

Powered by ReviewNB

[RoyElkabetz]

The notebook is failing on code cell 2 with provider = IBMProvider().
It seems like the current notebook version is different from the one we had on ibm-quantum-learning-enablement.

[RoyElkabetz]

LGTM

[RoyElkabetz]

LGTM

[abbycross]

(Sorry I can't comment in context; the raw git diff is too large to be displayed and we can't comment on the rich diff, alas!)

In Block [4], line 12 (If there is a failure, you should reset the "dirty" state and start again.) I would just remove "you should".

Also in Block [4], line 1 -- where the heralding is described... does that happen automatically (thereby justifying the passive voice) or does the user choose what to apply after they see the measurements? ('both control bit measurements return $0$, the gate $R_X(\theta)$ with $\cos\theta = \frac35$ is applied. If any of the measurements are $1$, gate $X$ is applied, which is a failure.`)

[beckykd]

(Sorry I can't comment in context; the raw git diff is too large to be displayed and we can't comment on the rich diff, alas!)

Grrr.

In Block [4], line 12 (If there is a failure, you should reset the "dirty" state and start again.) I would just remove "you should".

Done

Also in Block [4], line 1 -- where the heralding is described... does that happen automatically (thereby justifying the passive voice) or does the user choose what to apply after they see the measurements? ('both control bit measurements return 0, the gate RX(θ) with cos⁡θ=35 is applied. If any of the measurements are 1, gate X is applied, which is a failure.`)

It happens automatically. Thanks!

[RoyElkabetz]

LGTM