Fail with error when --profile used without JSON format (#1918)

* Fail with error when --profile used without JSON format

The --profile flag only works with --format json but previously
produced no output silently when used with other formats. Now
returns an error telling the user to use --format json.

Fixes #1542

Signed-off-by: Matt Van Horn <455140+mvanhorn@users.noreply.github.com>

* fix: use errors.New and add whitespace for linter compliance

Replace fmt.Errorf with errors.New (no format verbs) and add
blank line above ctx assignment per wsl_v5 linter.

Signed-off-by: Matt Van Horn <455140+mvanhorn@users.noreply.github.com>

---------

Signed-off-by: Matt Van Horn <455140+mvanhorn@users.noreply.github.com>
Co-authored-by: Matt Van Horn <455140+mvanhorn@users.noreply.github.com>

Author: mvanhorn

cmd/lint.go

@@ -171,6 +171,10 @@ func init() {
 }
 
 func lint(args []string, params *lintParams) (result report.Report, err error) {
+	if params.profile && params.format != formatJSON {
+		return report.Report{}, errors.New("--profile requires --format json to display profiling data")
+	}
+
 	ctx, cancel := getLinterContext(params.lintAndFixParams)
 	defer cancel()