Move consuming trailing element whitespace inside the parsers.

This ensures the parsers can take into account the affiliated keywords when setting their source without needing the SetSource trait.

src/parser/footnote_definition.rs

@@ -15,6 +15,7 @@ use super::keyword::affiliated_keyword;
 use super::org_source::OrgSource;
 use super::util::get_name;
 use super::util::include_input;
+use super::util::maybe_consume_trailing_whitespace_if_not_exiting;
 use super::util::WORD_CONSTITUENT_CHARACTERS;
 use crate::context::parser_with_context;
 use crate::context::ContextElement;
@@ -43,8 +44,8 @@ pub(crate) fn footnote_definition<'b, 'g, 'r, 's>(
             "Cannot nest objects of the same element".into(),
         ))));
     }
-    let (input, affiliated_keywords) = many0(affiliated_keyword)(input)?;
-    start_of_line(input)?;
+    let (remaining, affiliated_keywords) = many0(affiliated_keyword)(input)?;
+    start_of_line(remaining)?;
     // Cannot be indented.
     let (remaining, (_, lbl, _, _, _)) = tuple((
         tag_no_case("[fn:"),
@@ -54,7 +55,7 @@ pub(crate) fn footnote_definition<'b, 'g, 'r, 's>(
         opt(verify(many0(blank_line), |lines: &Vec<OrgSource<'_>>| {
             lines.len() <= 2
         })),
-    ))(input)?;
+    ))(remaining)?;
     let contexts = [
         ContextElement::ConsumeTrailingWhitespace(true),
         ContextElement::Context("footnote definition"),
@@ -83,6 +84,8 @@ pub(crate) fn footnote_definition<'b, 'g, 'r, 's>(
         }
     }
 
+    let (remaining, _trailing_ws) =
+        maybe_consume_trailing_whitespace_if_not_exiting(context, remaining)?;
     let source = get_consumed(input, remaining);
     Ok((
         remaining,