Remve redundant org_spaces functions.

Turns out the nom space0/space1 parsers accept tab characters already.

src/parser/headline.rs

@@ -1,6 +1,7 @@
 use nom::branch::alt;
 use nom::bytes::complete::tag;
 use nom::character::complete::anychar;
+use nom::character::complete::space0;
 use nom::character::complete::space1;
 use nom::combinator::map;
 use nom::combinator::not;
@@ -20,8 +21,6 @@ use super::util::get_consumed;
 use super::util::org_line_ending;
 use super::util::org_space;
 use super::util::org_space_or_line_ending;
-use super::util::org_spaces0;
-use super::util::org_spaces1;
 use super::util::start_of_line;
 use crate::context::parser_with_context;
 use crate::context::ContextElement;
@@ -134,27 +133,27 @@ fn headline<'b, 'g, 'r, 's>(
     ))(input)?;
 
     let (remaining, maybe_todo_keyword) = opt(tuple((
-        org_spaces1,
+        space1,
         parser_with_context!(heading_keyword)(&parser_context),
         peek(org_space_or_line_ending),
     )))(remaining)?;
 
-    let (remaining, maybe_priority) = opt(tuple((org_spaces1, priority_cookie)))(remaining)?;
+    let (remaining, maybe_priority) = opt(tuple((space1, priority_cookie)))(remaining)?;
 
     let (remaining, maybe_comment) = opt(tuple((
-        org_spaces1,
+        space1,
         tag("COMMENT"),
         peek(org_space_or_line_ending),
     )))(remaining)?;
 
     let (remaining, maybe_title) = opt(tuple((
-        org_spaces1,
+        space1,
         many1(parser_with_context!(standard_set_object)(&parser_context)),
     )))(remaining)?;
 
-    let (remaining, maybe_tags) = opt(tuple((org_spaces0, tags)))(remaining)?;
+    let (remaining, maybe_tags) = opt(tuple((space0, tags)))(remaining)?;
 
-    let (remaining, _) = tuple((org_spaces0, org_line_ending))(remaining)?;
+    let (remaining, _) = tuple((space0, org_line_ending))(remaining)?;
 
     Ok((
         remaining,
@@ -180,11 +179,7 @@ fn headline_title_end<'b, 'g, 'r, 's>(
     _context: RefContext<'b, 'g, 'r, 's>,
     input: OrgSource<'s>,
 ) -> Res<OrgSource<'s>, OrgSource<'s>> {
-    recognize(tuple((
-        org_spaces0,
-        opt(tuple((tags, org_spaces0))),
-        org_line_ending,
-    )))(input)
+    recognize(tuple((space0, opt(tuple((tags, space0))), org_line_ending)))(input)
 }
 
 #[cfg_attr(feature = "tracing", tracing::instrument(ret, level = "debug"))]