gps: simplify x = x <op> y to x <op>= y

[kevinburke]

Simplify x += 1 further to x++.

Already open as #2028 but the fork doesn't exist anymore and I can't push changes to it.

Originally submitted by @quasilyte

[googlebot]

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[kevinburke]

Ah, right, we're not going to be able to merge this until #2114 is fixed.

[googlebot]

☹️ Sorry, but only Googlers may change the label cla: yes.

[kevinburke]

Appreciate the vote of confidence @jmank88 but the Google CLA bot won't let us merge this PR despite the fact that both contributors have signed the CLA.

[googlebot]

A Googler has manually verified that the CLAs look good.

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[googlebot]

A Googler has manually verified that the CLAs look good.

(Googler, please make sure the reason for overriding the CLA status is clearly documented in these comments.)

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[googlebot]

So there's good news and bad news.

👍 The good news is that everyone that needs to sign a CLA (the pull request submitter and all commit authors) have done so. Everything is all good there.

😕 The bad news is that it appears that one or more commits were authored or co-authored by someone other than the pull request submitter. We need to confirm that all authors are ok with their commits being contributed to this project. Please have them confirm that here in the pull request.

Note to project maintainer: This is a terminal state, meaning the cla/google commit status will not change from this state. It's up to you to confirm consent of all the commit author(s), set the cla label to yes (if enabled on your project), and then merge this pull request when appropriate.

ℹ️ Googlers: Go here for more info.

[googlebot]

So there's good news and bad news.

👍 The good news is that everyone that needs to sign a CLA (the pull request submitter and all commit authors) have done so. Everything is all good there.

😕 The bad news is that it appears that one or more commits were authored or co-authored by someone other than the pull request submitter. We need to confirm that all authors are ok with their commits being contributed to this project. Please have them confirm that here in the pull request.

Note to project maintainer: This is a terminal state, meaning the cla/google commit status will not change from this state. It's up to you to confirm consent of all the commit author(s), set the cla label to yes (if enabled on your project), and then merge this pull request when appropriate.

ℹ️ Googlers: Go here for more info.

[googlebot]

CLAs look good, thanks!

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[googlebot]

CLAs look good, thanks!

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