Issue #2553311 by mikeryan, quietone: Drupal file migrations need to urlencode paths

core/modules/file/config/schema/file.destination.schema.yml

@@ -5,3 +5,6 @@ migrate.destination.entity:file:
     source_path_property:
       type: string
       label: 'Source path'
+    urlencode:
+      type: boolean
+      label: 'Whether to urlencode incoming file paths'

core/modules/file/migration_templates/d6_file.yml

@@ -23,3 +23,4 @@ process:
   uid: uid
 destination:
   plugin: entity:file
+  urlencode: true

core/modules/file/migration_templates/d7_file.yml

@@ -23,3 +23,4 @@ process:
 destination:
   plugin: entity:file
   source_path_property: filepath
+  urlencode: true