cmd/internal/goobj: make error output clear

Change-Id: Ic8510037e5d745f3c9f1b9c203439d3fe2e2d5a5
GitHub-Last-Rev: 4101a15
GitHub-Pull-Request: #74703
Reviewed-on: https://go-review.googlesource.com/c/go/+/689515
Reviewed-by: Michael Knyszek <[email protected]>
Reviewed-by: Keith Randall <[email protected]>
Reviewed-by: Keith Randall <[email protected]>
Auto-Submit: Keith Randall <[email protected]>
Auto-Submit: Michael Knyszek <[email protected]>
LUCI-TryBot-Result: Go LUCI <[email protected]>

Author: wingrez

src/cmd/internal/goobj/mkbuiltin.go

@@ -78,7 +78,7 @@ func mkbuiltin(w io.Writer) {
 				continue
 			}
 			if decl.Tok != token.VAR {
-				log.Fatal("unhandled declaration kind", decl.Tok)
+				log.Fatal("unhandled declaration kind: ", decl.Tok)
 			}
 			for _, spec := range decl.Specs {
 				spec := spec.(*ast.ValueSpec)
@@ -92,7 +92,7 @@ func mkbuiltin(w io.Writer) {
 				}
 			}
 		default:
-			log.Fatal("unhandled decl type", decl)
+			log.Fatal("unhandled decl type: ", decl)
 		}
 	}