update linter config, satisfy linter (#28)

app/attr.go

@@ -1,3 +1,5 @@
+package app
+
 /*
 Copyright © 2024-2025 Thomas von Dein
 
@@ -14,7 +16,6 @@ GNU General Public License for more details.
 You should have received a copy of the GNU General Public License
 along with this program. If not, see <http://www.gnu.org/licenses/>.
 */
-package app
 
 import (
 	"fmt"
@@ -125,17 +126,24 @@ func (attr *DbAttr) GetFileValue() error {
 		}
 	} else {
 		// read from console stdin
-		var input string
-		var data string
+		var (
+			input string
+			data  string
+			buf   strings.Builder
+		)
 
 		for {
 			_, err := fmt.Scanln(&input)
 			if err != nil {
 				break
 			}
-			data += input + "\n"
+
+			buf.WriteString(input)
+			buf.WriteString("\n")
 		}
 
+		data += buf.String()
+
 		attr.Val = []byte(data)
 	}