cmd/go: point tidy errors to correct URL

The `go mod tidy` errors have been pointing to an older URL. This CL
fixes the URL by pointing to the correct URL: https://go.dev/ref/mod.

Fixes #49394

Change-Id: I707dda407ba032db8a55083998002a5ab72033e8
Reviewed-on: https://go-review.googlesource.com/c/go/+/633421
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: Sean Liao <sean@liao.dev>
Reviewed-by: Michael Matloob <matloob@golang.org>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>

src/cmd/go/internal/modload/load.go

@@ -2086,8 +2086,7 @@ func (ld *loader) checkTidyCompatibility(ctx context.Context, rs *Requirements,
 
 		fmt.Fprintf(os.Stderr, "If reproducibility with go %s is not needed:\n\tgo mod tidy%s -compat=%s\n", compatVersion, goFlag, goVersion)
 
-		// TODO(#46141): Populate the linked wiki page.
+		fmt.Fprintf(os.Stderr, "For information about 'go mod tidy' compatibility, see:\n\thttps://go.dev/ref/mod#graph-pruning\n")
-		fmt.Fprintf(os.Stderr, "For other options, see:\n\thttps://golang.org/doc/modules/pruning\n")
 	}
 
 	mg, err := rs.Graph(ctx)

src/cmd/go/testdata/script/mod_tidy_compat_ambiguous.txt

@@ -23,7 +23,7 @@ cp go.mod go.mod.orig
 
 stderr '^go: example\.com/m imports\n\texample\.net/indirect imports\n\texample\.net/ambiguous/nested/pkg loaded from example\.net/ambiguous/nested@v0\.1\.0,\n\tbut go 1.16 would fail to locate it:\n\tambiguous import: found package example\.net/ambiguous/nested/pkg in multiple modules:\n\texample\.net/ambiguous v0.1.0 \(.*\)\n\texample\.net/ambiguous/nested v0.1.0 \(.*\)\n\n'
 
-stderr '\n\nTo proceed despite packages unresolved in go 1\.16:\n\tgo mod tidy -e\nIf reproducibility with go 1.16 is not needed:\n\tgo mod tidy -compat=1\.17\nFor other options, see:\n\thttps://golang\.org/doc/modules/pruning\n'
+stderr '\n\nTo proceed despite packages unresolved in go 1\.16:\n\tgo mod tidy -e\nIf reproducibility with go 1.16 is not needed:\n\tgo mod tidy -compat=1\.17\nFor information about ''go mod tidy'' compatibility, see:\n\thttps://go\.dev/ref/mod#graph-pruning\n'
 
 cmp go.mod go.mod.orig
 
@@ -33,7 +33,7 @@ cmp go.mod go.mod.orig
 [exec:patch] ! go mod tidy -diff
 [exec:patch] ! stdout .
 [exec:patch] stderr '^go: example\.com/m imports\n\texample\.net/indirect imports\n\texample\.net/ambiguous/nested/pkg loaded from example\.net/ambiguous/nested@v0\.1\.0,\n\tbut go 1.16 would fail to locate it:\n\tambiguous import: found package example\.net/ambiguous/nested/pkg in multiple modules:\n\texample\.net/ambiguous v0.1.0 \(.*\)\n\texample\.net/ambiguous/nested v0.1.0 \(.*\)\n\n'
-[exec:patch] stderr '\n\nTo proceed despite packages unresolved in go 1\.16:\n\tgo mod tidy -e\nIf reproducibility with go 1.16 is not needed:\n\tgo mod tidy -compat=1\.17\nFor other options, see:\n\thttps://golang\.org/doc/modules/pruning\n'
+[exec:patch] stderr '\n\nTo proceed despite packages unresolved in go 1\.16:\n\tgo mod tidy -e\nIf reproducibility with go 1.16 is not needed:\n\tgo mod tidy -compat=1\.17\nFor information about ''go mod tidy'' compatibility, see:\n\thttps://go\.dev/ref/mod#graph-pruning\n'
 
 
 # If we run 'go mod tidy -e', we should still save enough checksums to run

src/cmd/go/testdata/script/mod_tidy_compat_deleted.txt

@@ -19,7 +19,7 @@ cp go.mod go.mod.orig
 
 stderr '^go: example\.com/m imports\n\texample\.net/deleted loaded from example\.net/deleted@v0\.1\.0,\n\tbut go 1\.16 would fail to locate it in example\.net/deleted@v0\.2\.0\n\n'
 
-stderr '\n\nTo upgrade to the versions selected by go 1.16, leaving some packages unresolved:\n\tgo mod tidy -e -go=1\.16 && go mod tidy -e -go=1\.17\nIf reproducibility with go 1.16 is not needed:\n\tgo mod tidy -compat=1\.17\nFor other options, see:\n\thttps://golang\.org/doc/modules/pruning\n'
+stderr '\n\nTo upgrade to the versions selected by go 1.16, leaving some packages unresolved:\n\tgo mod tidy -e -go=1\.16 && go mod tidy -e -go=1\.17\nIf reproducibility with go 1.16 is not needed:\n\tgo mod tidy -compat=1\.17\nFor information about ''go mod tidy'' compatibility, see:\n\thttps://go\.dev/ref/mod#graph-pruning\n'
 
 # Make sure that -diff behaves the same as tidy.
 [exec:patch] cp go.mod.orig go.mod
@@ -27,7 +27,7 @@ stderr '\n\nTo upgrade to the versions selected by go 1.16, leaving some package
 [exec:patch] ! go mod tidy -diff
 [exec:patch] ! stdout .
 [exec:patch] stderr '^go: example\.com/m imports\n\texample\.net/deleted loaded from example\.net/deleted@v0\.1\.0,\n\tbut go 1\.16 would fail to locate it in example\.net/deleted@v0\.2\.0\n\n'
-[exec:patch] stderr '\n\nTo upgrade to the versions selected by go 1.16, leaving some packages unresolved:\n\tgo mod tidy -e -go=1\.16 && go mod tidy -e -go=1\.17\nIf reproducibility with go 1.16 is not needed:\n\tgo mod tidy -compat=1\.17\nFor other options, see:\n\thttps://golang\.org/doc/modules/pruning\n'
+[exec:patch] stderr '\n\nTo upgrade to the versions selected by go 1.16, leaving some packages unresolved:\n\tgo mod tidy -e -go=1\.16 && go mod tidy -e -go=1\.17\nIf reproducibility with go 1.16 is not needed:\n\tgo mod tidy -compat=1\.17\nFor information about ''go mod tidy'' compatibility, see:\n\thttps://go\.dev/ref/mod#graph-pruning\n'
 
 # The suggested 'go mod tidy -e' command should proceed anyway.
 

src/cmd/go/testdata/script/mod_tidy_compat_implicit.txt

@@ -33,7 +33,7 @@ env MODFMT='{{with .Module}}{{.Path}} {{.Version}}{{end}}'
 cp go.mod go.mod.orig
 ! go mod tidy
 stderr '^go: example\.com/m imports\n\texample\.net/lazy tested by\n\texample\.net/lazy.test imports\n\texample\.com/retract/incompatible loaded from example\.com/retract/incompatible@v1\.0\.0,\n\tbut go 1\.16 would select v2\.0\.0\+incompatible\n\n'
-stderr '\n\nTo upgrade to the versions selected by go 1\.16:\n\tgo mod tidy -go=1\.16 && go mod tidy -go=1\.17\nIf reproducibility with go 1.16 is not needed:\n\tgo mod tidy -compat=1.17\nFor other options, see:\n\thttps://golang\.org/doc/modules/pruning\n'
+stderr '\n\nTo upgrade to the versions selected by go 1\.16:\n\tgo mod tidy -go=1\.16 && go mod tidy -go=1\.17\nIf reproducibility with go 1.16 is not needed:\n\tgo mod tidy -compat=1.17\nFor information about ''go mod tidy'' compatibility, see:\n\thttps://go\.dev/ref/mod#graph-pruning\n'
 
 cmp go.mod go.mod.orig
 
@@ -43,7 +43,7 @@ cmp go.mod go.mod.orig
 [exec:patch] ! go mod tidy -diff
 [exec:patch] ! stdout .
 [exec:patch] stderr '^go: example\.com/m imports\n\texample\.net/lazy tested by\n\texample\.net/lazy.test imports\n\texample\.com/retract/incompatible loaded from example\.com/retract/incompatible@v1\.0\.0,\n\tbut go 1\.16 would select v2\.0\.0\+incompatible\n\n'
-[exec:patch] stderr '\n\nTo upgrade to the versions selected by go 1\.16:\n\tgo mod tidy -go=1\.16 && go mod tidy -go=1\.17\nIf reproducibility with go 1.16 is not needed:\n\tgo mod tidy -compat=1.17\nFor other options, see:\n\thttps://golang\.org/doc/modules/pruning\n'
+[exec:patch] stderr '\n\nTo upgrade to the versions selected by go 1\.16:\n\tgo mod tidy -go=1\.16 && go mod tidy -go=1\.17\nIf reproducibility with go 1.16 is not needed:\n\tgo mod tidy -compat=1.17\nFor information about ''go mod tidy'' compatibility, see:\n\thttps://go\.dev/ref/mod#graph-pruning\n'
 
 # The suggested '-compat' flag to ignore differences should silence the error
 # and leave go.mod unchanged, resulting in checksum errors when Go 1.16 tries

src/cmd/go/testdata/script/mod_tidy_compat_incompatible.txt

@@ -33,7 +33,7 @@ env MODFMT='{{with .Module}}{{.Path}} {{.Version}}{{end}}'
 cp go.mod go.mod.orig
 ! go mod tidy
 stderr '^go: example\.com/m imports\n\texample\.net/lazy imports\n\texample\.com/retract/incompatible loaded from example\.com/retract/incompatible@v1\.0\.0,\n\tbut go 1\.16 would select v2\.0\.0\+incompatible\n\n'
-stderr '\n\nTo upgrade to the versions selected by go 1\.16:\n\tgo mod tidy -go=1\.16 && go mod tidy -go=1\.17\nIf reproducibility with go 1\.16 is not needed:\n\tgo mod tidy -compat=1.17\nFor other options, see:\n\thttps://golang\.org/doc/modules/pruning\n'
+stderr '\n\nTo upgrade to the versions selected by go 1\.16:\n\tgo mod tidy -go=1\.16 && go mod tidy -go=1\.17\nIf reproducibility with go 1\.16 is not needed:\n\tgo mod tidy -compat=1.17\nFor information about ''go mod tidy'' compatibility, see:\n\thttps://go\.dev/ref/mod#graph-pruning\n'
 
 cmp go.mod go.mod.orig
 
@@ -43,7 +43,7 @@ cmp go.mod go.mod.orig
 [exec:patch] ! go mod tidy -diff
 [exec:patch] ! stdout .
 [exec:patch] stderr '^go: example\.com/m imports\n\texample\.net/lazy imports\n\texample\.com/retract/incompatible loaded from example\.com/retract/incompatible@v1\.0\.0,\n\tbut go 1\.16 would select v2\.0\.0\+incompatible\n\n'
-[exec:patch] stderr '\n\nTo upgrade to the versions selected by go 1\.16:\n\tgo mod tidy -go=1\.16 && go mod tidy -go=1\.17\nIf reproducibility with go 1\.16 is not needed:\n\tgo mod tidy -compat=1.17\nFor other options, see:\n\thttps://golang\.org/doc/modules/pruning\n'
+[exec:patch] stderr '\n\nTo upgrade to the versions selected by go 1\.16:\n\tgo mod tidy -go=1\.16 && go mod tidy -go=1\.17\nIf reproducibility with go 1\.16 is not needed:\n\tgo mod tidy -compat=1.17\nFor information about ''go mod tidy'' compatibility, see:\n\thttps://go\.dev/ref/mod#graph-pruning\n'
 
 # The suggested '-compat' flag to ignore differences should silence the error
 # and leave go.mod unchanged, resulting in checksum errors when Go 1.16 tries