devapp/owners: add mvdan as secondary to cmd/gofmt

I've contributed sporadically over the years,
and more recently by experimenting externally in gofumpt.

With a CL in-flight to make gofmt format files in parallel,
it feels like it's time to make this a bit more official.

The main important bits are cmd/gofmt, the tool,
and go/printer, the guts of the tool.
go/format is pulled in as a library version of cmd/gofmt.

Note that cmd/gofmt wasn't in the table,
but it feels like it should be there,
as it's pretty different from the other cmd/... tools.

Change-Id: Ia3455707105b8ab1fcd35799b592de85a9313655
Reviewed-on: https://go-review.googlesource.com/c/build/+/350550
Trust: Daniel Martí <[email protected]>
Reviewed-by: Robert Griesemer <[email protected]>

Author: mvdan

devapp/owners/table.go

@@ -174,6 +174,10 @@ var entries = map[string]*Entry{
 		Primary:   []Owner{bcmills, jayconrod, matloob},
 		Secondary: []Owner{rsc, iant},
 	},
+	"go/src/cmd/gofmt": {
+		Primary:   []Owner{gri},
+		Secondary: []Owner{mvdan},
+	},
 	"go/src/cmd/internal/obj/wasm": wasmOwners,
 	"go/src/cmd/link": {
 		Primary:   []Owner{cherryyz, rsc, iant},
@@ -293,7 +297,8 @@ var entries = map[string]*Entry{
 		Secondary: []Owner{agnivade},
 	},
 	"go/src/go/format": {
-		Primary: []Owner{gri},
+		Primary:   []Owner{gri},
+		Secondary: []Owner{mvdan},
 	},
 	"go/src/go/importer": {
 		Primary: []Owner{gri, adonovan},
@@ -313,7 +318,8 @@ var entries = map[string]*Entry{
 		Primary: []Owner{gri},
 	},
 	"go/src/go/printer": {
-		Primary: []Owner{gri},
+		Primary:   []Owner{gri},
+		Secondary: []Owner{mvdan},
 	},
 	"go/src/go/scanner": {
 		Primary: []Owner{gri},