[release-branch.go1.18] cmd/go: add links to workspaces reference and…

… tutorial to go help work

For #45713

Change-Id: Ia2901cbfc5deb52503e74fcf9dff26a56ec582c3
Reviewed-on: https://go-review.googlesource.com/c/go/+/389297
Trust: Michael Matloob <matloob@golang.org>
Run-TryBot: Michael Matloob <matloob@golang.org>
Reviewed-by: Bryan Mills <bcmills@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
(cherry picked from commit 1eb1f62)
Reviewed-on: https://go-review.googlesource.com/c/go/+/389914
Trust: Dmitri Shuralyov <dmitshur@golang.org>
Run-TryBot: Dmitri Shuralyov <dmitshur@golang.org>

src/cmd/go/internal/workcmd/edit.go

@@ -84,9 +84,8 @@ writing it back to go.mod. The JSON output corresponds to these Go types:
  Version string
  }
 
-See the workspaces design proposal at
-https://go.googlesource.com/proposal/+/master/design/45713-workspace.md for
-more information.
+See the workspaces reference at https://go.dev/ref/mod#workspaces
+for more information.
 `,
 }
 

src/cmd/go/internal/workcmd/init.go

@@ -27,6 +27,8 @@ modules will be created.
 Each argument path is added to a use directive in the go.work file. The
 current go version will also be listed in the go.work file.
 
+See the workspaces reference at https://go.dev/ref/mod#workspaces
+for more information.
 `,
  Run: runInit,
 }

src/cmd/go/internal/workcmd/sync.go

@@ -33,6 +33,9 @@ if the dependency module's version is not already the same as the build
 list's version. Note that Minimal Version Selection guarantees that the
 build list's version of each module is always the same or higher than
 that in each workspace module.
+
+See the workspaces reference at https://go.dev/ref/mod#workspaces
+for more information.
 `,
  Run: runSync,
 }

src/cmd/go/internal/workcmd/use.go

@@ -33,6 +33,9 @@ The -r flag searches recursively for modules in the argument
 directories, and the use command operates as if each of the directories
 were specified as arguments: namely, use directives will be added for
 directories that exist, and removed for directories that do not exist.
+
+See the workspaces reference at https://go.dev/ref/mod#workspaces
+for more information.
 `,
 }
 

src/cmd/go/internal/workcmd/work.go

@@ -12,14 +12,20 @@ import (
 var CmdWork = &base.Command{
  UsageLine: "go work",
  Short: "workspace maintenance",
- Long: `Go workspace provides access to operations on workspaces.
+ Long: `Work provides access to operations on workspaces.
 
 Note that support for workspaces is built into many other commands, not
 just 'go work'.
 
 See 'go help modules' for information about Go's module system of which
 workspaces are a part.
 
+See https://go.dev/ref/mod#workspaces for an in-depth reference on
+workspaces.
+
+See https://go.dev/doc/tutorial/workspaces for an introductory
+tutorial on workspaces.
+
 A workspace is specified by a go.work file that specifies a set of
 module directories with the "use" directive. These modules are used as
 root modules by the go command for builds and related operations. A