pandoc/test/command/5700.md

```
% pandoc -t native -s --metadata-file command/5700-metadata-file-1.yml --metadata-file command/5700-metadata-file-2.yml
^D
Pandoc (Meta {unMeta = fromList [("desc",MetaInlines [Str "Both",Space,Str "of",Space,Str "these",Space,Str "files",Space,Str "should",Space,Str "be",Space,Str "loaded."]),("title",MetaInlines [Str "Multiple",Space,Str "metadata",Space,Str "files",Space,Str "test"])]})
[]
```
Change optMetadataFile type from Maybe to List (#5702) Changed optMetadataFile from `Maybe FilePath` to `[FilePath]`. This allows for multiple YAML metadata files to be added. The new default value has been changed from `Nothing` to `[]`. To account for this change in `Text.Pandoc.App`, `metaDataFromFile` now operates on two `mapM` calls (for `readFileLazy` and `yamlToMeta`) and a fold. Added a test (command/5700.md) which tests this functionality and updated MANUAL.txt, as per the contributing guidelines. With the current behavior, using `foldr1 (<>)`, values within files specified first will be used over those in later files. (If the reverse of this behavior would be preferred, it should be fixed by changing foldr1 to foldl1.) 2019-08-24 18:41:25 +02:00			```
			`% pandoc -t native -s --metadata-file command/5700-metadata-file-1.yml --metadata-file command/5700-metadata-file-2.yml`
			`^D`
			`Pandoc (Meta {unMeta = fromList [("desc",MetaInlines [Str "Both",Space,Str "of",Space,Str "these",Space,Str "files",Space,Str "should",Space,Str "be",Space,Str "loaded."]),("title",MetaInlines [Str "Multiple",Space,Str "metadata",Space,Str "files",Space,Str "test"])]})`
			`[]`
			```