adding tests for error

go/cmd/dolt/commands/log.go

@@ -126,7 +126,7 @@ func (cmd LogCmd) logWithLoggerFunc(ctx context.Context, commandStr string, args
 	switch decorateOption {
 	case "short", "full", "auto", "no":
 	default:
-		cli.PrintErrln(color.HiRedString("fatal : invalid --decorate option: " + decorateOption))
+		cli.PrintErrln(color.HiRedString("fatal: invalid --decorate option: " + decorateOption))
 		return 1
 	}
 	opts := logOpts{

integration-tests/bats/log.bats

@@ -372,6 +372,12 @@ teardown() {
     [ "$res" -eq 4 ] # exactly 1 line is added
 }
 
+@test "log: --decorate=notanoption throws error" {
+    run dolt log --decorate=notanoption
+    [ "$status" -eq 1 ]
+    [[ "$output" =~ "fatal: invalid --decorate option" ]] || false
+}
+
 @test "log: check pager" {
     skiponwindows "Need to install expect and make this script work on windows."
     dolt commit --allow-empty -m "commit 1"