Printinf on snapshot and errors has breakline

Author: davesnx

ppx/test/record-props-error.t/run.t

@@ -1,8 +1,8 @@
 Since we generate invalid syntax for the argument of the make fn `(Props : <>)`
 We need to output ML syntax here, otherwise refmt could not parse it.
   $ ../ppx.sh --output ml input.re
-  File "output.ml", line 4, characters 27-35:
-  4 |       [@@react.component { no_props = string }]
-                                 ^^^^^^^^
+  File "output.ml", line 5, characters 68-76:
+  5 |                                                                     no_props
+                                                                          ^^^^^^^^
   Error: [@react.component] only accepts 'props' as a field, given: no_props
   [1]