Allow spaces before closing braces on tags without parameters.

Previously I incorrectly only supported spaces before closing braces on tags with parameters. This patch expands that behavior to all tags.

src/parser/parser.rs

@@ -358,7 +358,10 @@ fn key_to_path<'a>(i: &'a str) -> IResult<&str, Path<'a>> {
 fn postitive_integer_literal(i: &str) -> IResult<&str, u64> {
     map(
         verify(
-            map(digit1, |number_string: &str| number_string.parse::<u64>()),
+            map(
+                recognize(tuple((opt(tag("+")), digit1))),
+                |number_string: &str| number_string.parse::<u64>(),
+            ),
             |parse_result| parse_result.is_ok(),
         ),
         |parsed_number| parsed_number.unwrap(),
@@ -434,7 +437,11 @@ fn key_value_pair(i: &str) -> IResult<&str, KVPair> {
 
 /// Display a value from the context
 fn reference(i: &str) -> IResult<&str, Reference> {
-    let (remaining, (p, filters)) = delimited(tag("{"), tuple((path, many0(filter))), tag("}"))(i)?;
+    let (remaining, (p, filters)) = delimited(
+        tag("{"),
+        tuple((path, many0(filter))),
+        preceded(space0, tag("}")),
+    )(i)?;
     Ok((
         remaining,
         Reference {
@@ -484,12 +491,8 @@ where
                     preceded(tag(open_matcher), name_matcher),
                     opt(preceded(tag(":"), path)),
                     terminated(
-                        opt(delimited(
+                        opt(preceded(space1, separated_list1(space1, key_value_pair))),
-                            space1,
+                        preceded(space0, tag("}")),
-                            separated_list1(space1, key_value_pair),
-                            space0,
-                        )),
-                        tag("}"),
                     ),
                     opt(body),
                     opt(preceded(tag("{:else}"), opt(body))),
@@ -525,12 +528,8 @@ where
                     preceded(tag(open_matcher), name_matcher),
                     opt(preceded(tag(":"), path)),
                     terminated(
-                        opt(delimited(
+                        opt(preceded(space1, separated_list1(space1, key_value_pair))),
-                            space1,
+                        preceded(space0, tag("}")),
-                            separated_list1(space1, key_value_pair),
-                            space0,
-                        )),
-                        tag("}"),
                     ),
                     opt(body),
                     delimited(tag("{/"), name_matcher, tag("}")),
@@ -564,13 +563,9 @@ where
             tuple((
                 name_matcher,
                 opt(preceded(tag(":"), path)),
-                opt(delimited(
+                opt(preceded(space1, separated_list1(space1, key_value_pair))),
-                    space1,
-                    separated_list1(space1, key_value_pair),
-                    space0,
-                )),
             )),
-            tag("/}"),
+            preceded(space0, tag("/}")),
         )(i)?;
 
         Ok((
@@ -595,13 +590,9 @@ fn partial_with_plain_tag<'a>(
             tuple((
                 key,
                 opt(preceded(tag(":"), path)),
-                opt(delimited(
+                opt(preceded(space1, separated_list1(space1, key_value_pair))),
-                    space1,
-                    separated_list1(space1, key_value_pair),
-                    space0,
-                )),
             )),
-            tag("/}"),
+            preceded(space0, tag("/}")),
         )(i)?;
 
         Ok((
@@ -633,13 +624,9 @@ fn partial_with_quoted_tag<'a>(
             tuple((
                 template_string_rvalue,
                 opt(preceded(tag(":"), path)),
-                opt(delimited(
+                opt(preceded(space1, separated_list1(space1, key_value_pair))),
-                    space1,
-                    separated_list1(space1, key_value_pair),
-                    space0,
-                )),
             )),
-            tag("/}"),
+            preceded(space0, tag("/}")),
         )(i)?;
 
         Ok((