Fixes in the manual

doc/crossrefenum.md

@@ -164,7 +164,7 @@ for instance, you may want to use the word “and”
 before the last note number if the reference type is a simple one (`note`),
 and a comma if it is comes in second in a double reference (e.g. in `pagenote`).
 To achieve this, you should redefine `\crfnmDefaultEnumDelimInSecond`
-and `\crfnmDefaultBeforeLastInEnumInSecond`.
+and `\crfnmDefaultBeforeLastInSecond`.
 By default, these macros fall back respectively
 on `\crfnmDefaultEnumDelim` and `\crfnmDefaultBeforeLastInEnum`.
 
@@ -244,6 +244,7 @@ if this feature were not already included in _crossrefenum_.
 
 % Define the macro used by \crossrefenum internally
 % to retrieve the raw reference number without typesetting it.
+% This macro must be purely expandable.
 % If you want to support multiple formats,
 % see how the macro \crfnm@case is used in crossrefenum.tex.
 % Note: the Lua function get_raw_ref_number is defined