chore: expose internal files-separator input (#346)

action.yml

@@ -19,6 +19,10 @@ inputs:
     description: 'Check for changes using only this list of files (Defaults to the entire repo)'
     required: false
     default: ""
+  files-separator:
+    description: 'Separator used to split the files input'
+    default: "\n"
+    required: false
   sha:
     description: 'Specify a current commit SHA used for comparing changes'
     required: true
@@ -117,7 +121,7 @@ runs:
       id: glob
       with:
         files: ${{ inputs.files }}
-        files-separator: " "
+        files-separator: ${{ inputs.files-separator }}
         files-from-source-file: ${{ inputs.files_from_source_file }}
         separator: "|"
     - run: |