Apply some code review fixes

Author: bltravis

docs/source/tasks/inventory_batch_poster.md

@@ -55,7 +55,7 @@ The primary difference is that InventoryBatchPoster uses the `folio_data_import`
 ```{tip}
 `patchPaths` and `upsert=True` for `source=MARC` instances
 
-When performing an `upsert=True` task for instances where some existing instances my be `source=MARC`, if you want to update `staffSuppress`, `discoverySuppress` or `deleted` based on the contents of the incoming record, you will need to add those fields to `patchPaths` in your task configuration.
+When performing an `upsert=True` task for instances where some existing instances may be `source=MARC`, if you want to update `staffSuppress`, `discoverySuppress` or `deleted` based on the contents of the incoming record, you will need to add those fields to `patchPaths` in your task configuration.
 ```
 ### Object Types
 

tests/test_marc_reader_wrapper.py

@@ -1,3 +1,4 @@
+from pymarc.field import Indicators
 from types import SimpleNamespace
 
 from pymarc import Field, MARCReader, Record, Subfield
@@ -18,7 +19,7 @@ def add_local_note(
     record.add_field(
         Field(
             tag="590",
-            indicators=[" ", " "],
+            indicators=Indicators(*[" ", " "]),
             subfields=[Subfield(code="a", value=note_text)],
         )
     )