Fix filename as __from_DOI.bib

Author: korintje

doi2cite/README.md

@@ -3,7 +3,7 @@ This pandoc lua filiter helps users to insert references in a document
 with using DOI(Digital Object Identifier) tags. With this filter, users
 do not need to make bibtex file by themselves. Instead, the filter
 automatically generate .bib file from the DOI tags, and convert the DOI
-tags into citation keys available by `pandoc-crossref`.
+tags into citation keys available by `--citeproc`.
 
 <img src="https://user-images.githubusercontent.com/30950088/117561410-87ec5d00-b0d1-11eb-88be-931f3158ec44.png" width="960">
 
@@ -32,15 +32,12 @@ Following DOI tags can be used:
 The first one (@https://doi.org/) may be the most useful because it is
 same as the accessible URL.
 
-# Specify auto-generated bibliography file path
-The filename of the auto-generated bibliography file must be
-`__from_DOI.bib`, but the place of the file can be changed like
-`../reference/__from_DOI.bib`. You can designate the filepath in the
+# YAML header
+The file **name** of the auto-generated bibliography file **MUST** be
+`__from_DOI.bib`, but the **place** of the file can be changed (e.g. 
+`./refs/__from_DOI.bib`). You can designate the filepath in the
 document yaml header. The yaml key is `bibliography`, which is also
-recognized by Pandoc `--citeproc`. If the path does not explicitly
-given, the filepath will be set as `__from_DOI.bib` by default. Note
-that users typically should add same file path also in `bibliography`,
-in order to be recognized by `--citeproc`.
+used by Pandoc `--citeproc`.
 
 
 # Example
@@ -49,9 +46,8 @@ example1.md:
 
     ---
     bibliography:
-      - "doi_refs.bib"
       - "my_refs.bib"
-    bib_from_doi: "doi_refs.bib"
+      - "__from_DOI.bib"
     ---
 
     # Introduction