failing test on radiometricindices with multi-line string

otb/OTBAlgorithm.py

@@ -249,9 +249,11 @@ class OTBAlgorithm(QgsProcessingAlgorithm):
             if 'epsg' in k and v.startswith('EPSG:'):
                 v = v.split('EPSG:')[1]
 
+            if isinstance(v, str) and '\n' in v:
+                v = v.split('\n')
             if isinstance(v, list):
                 value = ''
-                for i in v:
+                for i in list(filter(None, v)):
                     value += '"{}" '.format(self.get_value(i))
             else:
                 value = '"{}"'.format(self.get_value(v))