fix(render): No implicit padding between secondary groups

Workaround for #309

Author: epage

src/renderer/render.rs

@@ -89,7 +89,8 @@ pub(crate) fn render(renderer: &Renderer, groups: Report<'_>) -> String {
                         max_line_num_len + 1,
                     );
                 }
-                if peek.is_none() && g == 0 && group_len > 1 {
+                if peek.is_none() && title_style == TitleStyle::MainHeader && (g + 1) < groups.len()
+                {
                     draw_col_separator_end(
                         renderer,
                         &mut buffer,

tests/formatter.rs

@@ -350,7 +350,6 @@ fn test_multi_secondary_group_no_snippet() {
     ];
     let expected_ascii = str![[r#"
 error: the core problem
-  |
 note: more information
 help: a way to fix this
 "#]];
@@ -359,7 +358,6 @@ help: a way to fix this
 
     let expected_unicode = str![[r#"
 error: the core problem
-  ╰╴
 note: more information
 help: a way to fix this
 "#]];