Consistent help text indentation using heredoc-style formatting

[michaeldwan]

Change Summary

What and Why:

A lot of our multi-line help text has wonky indentation because of how strings are formatted in the source code. This PR formats them with a heredoc helper to correct indentation automatically.

Before

$ go run . volume extend --help
Extends a target volume to the size specified. The instance is automatically restarted for Nomad (V1) apps.
		Most Machines (V2 apps) don't require a restart. Older Machines get a message to manually restart the Machine
		to increase the size of the FS.

After

$ go run . volume extend --help
Extends a target volume to the size specified. The instance is automatically restarted for Nomad (V1) apps.
Most Machines (V2 apps) don't require a restart. Older Machines get a message to manually restart the Machine
to increase the size of the FS.

How:

Related to:

---

Documentation

• Fresh Produce
• In superfly/docs, or asked for help from docs team
• n/a

[billyb2]

nice