Fix remaining issues with end coverage of sections

Author: lionel-

crates/ark/src/lsp/folding_range.rs

@@ -384,10 +384,7 @@ fn end_node_handler(
         // Iterate over each (start level, start line) in the last section
         for &(_level, start_line) in last_section.iter() {
             // Add a new folding range for each range in the last section
-            let folding_range = comment_range(
-                start_line,
-                find_last_non_empty_line(document, start_line, line_idx - 1),
-            );
+            let folding_range = comment_range(start_line, line_idx - 1);
 
             folding_ranges.push(folding_range);
         }

crates/ark/src/lsp/snapshots/ark__lsp__folding_range__tests__folding_section_chunks_with_section_in_middle.snap

@@ -16,7 +16,7 @@ expression: "test_folding_range(\"\n#+ Cell\na\n\n# Section ----\nb\n\n#+ Other
     FoldingRange {
         start_line: 4,
         start_character: None,
-        end_line: 8,
+        end_line: 9,
         end_character: None,
         kind: Some(
             Region,

crates/ark/src/lsp/snapshots/ark__lsp__folding_range__tests__folding_section_chunks_with_sections.snap

@@ -26,7 +26,7 @@ expression: "test_folding_range(\"\n# Section ----\na\n\n#+ Cell\nb\n\n# Section
     FoldingRange {
         start_line: 7,
         start_character: None,
-        end_line: 11,
+        end_line: 12,
         end_character: None,
         kind: Some(
             Region,

crates/ark/src/lsp/snapshots/ark__lsp__folding_range__tests__folding_section_comments.snap

@@ -16,7 +16,7 @@ expression: "test_folding_range(\"\n# Section ----\na\n\nb\nc\n\n# Section ----\
     FoldingRange {
         start_line: 7,
         start_character: None,
-        end_line: 8,
+        end_line: 9,
         end_character: None,
         kind: Some(
             Region,

crates/ark/src/lsp/snapshots/ark__lsp__folding_range__tests__folding_section_comments_basic.snap

@@ -1,6 +1,6 @@
 ---
 source: crates/ark/src/lsp/folding_range.rs
-expression: "test_folding_range(\"\n# First section ----\na\nb\n\n# Second section ----\nc\nd\n\n# %% Chunk section (jupyter-style)\ne\nf\n\n#+ Chunk section (knitr-style)\ng\n# + This is not a chunk\nh\")"
+expression: "test_folding_range(\"\n# First section ----\na\nb\n\n# Second section ----\nc\nd\n\n# %% Chunk section (jupyter-style)\ne\nf\n\n#+ Chunk section (knitr-style)\ng\n# + This is not a chunk\nh\n\")"
 ---
 [
     FoldingRange {
@@ -16,7 +16,7 @@ expression: "test_folding_range(\"\n# First section ----\na\nb\n\n# Second secti
     FoldingRange {
         start_line: 5,
         start_character: None,
-        end_line: 16,
+        end_line: 17,
         end_character: None,
         kind: Some(
             Region,