Add --no-show-signature to "git show" commands

[stefansundin]

Summary

This fixes errors if the user has configured the following in their ~/.gitconfig:

[log]
showSignature = true

Fixes the following error:

$ cross-env NODE_ENV=production node ./chrome/build
SyntaxError: Unterminated string constant (1:1)

[ ... ]

Unterminated string constant (22:21)
|           context: {
|             surface,
|             version: "4.22.1-gpg: Signature made Thu Dec 23 10:08:56 2021 PST
| gpg:                using RSA key 4AEE18F83AFDEB23
| gpg: Can't check signature: No public key

How did you test this change?

I no longer get the error.

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[sizebot]

Comparing: 3dc41d8...b799cfd

Critical size changes

Includes critical production bundles, as well as any change greater than 2%:

Name	+/-	Base	Current	+/- gzip	Base gzip	Current gzip
oss-stable/react-dom/cjs/react-dom.production.min.js	=	129.52 kB	129.52 kB	=	41.53 kB	41.53 kB
oss-experimental/react-dom/cjs/react-dom.production.min.js	=	134.65 kB	134.65 kB	=	43.01 kB	43.01 kB
facebook-www/ReactDOM-prod.classic.js	=	427.76 kB	427.76 kB	=	78.53 kB	78.53 kB
facebook-www/ReactDOM-prod.modern.js	=	417.45 kB	417.45 kB	=	77.06 kB	77.06 kB
facebook-www/ReactDOMForked-prod.classic.js	=	427.76 kB	427.76 kB	=	78.53 kB	78.53 kB

Significant size changes

Includes any change greater than 0.2%:

(No significant changes)

Generated by 🚫 dangerJS against b799cfd

[facebook-github-bot]

Thank you for signing our Contributor License Agreement. We can now accept your code for this (and any) Meta Open Source project. Thanks!

[facebook-github-bot]

Thank you for signing our Contributor License Agreement. We can now accept your code for this (and any) Meta Open Source project. Thanks!

[bvaughn]

I am not familiar with the "--no-show-signature" flag. It seems like it was added in Git v2.10 (git/git@aa37999). My main concern was that it will seemingly cause older versions of Git to throw ("unrecognized argument") but I guess 2.10 has been out long enough that it's okay for us to add this change.