#359 add failing test for DOCX list run whitespace

Separate text runs within a paragraph are concatenated without spaces.
Root cause is trim_text(true) in docx-lite's XML parser stripping
whitespace from <w:t> elements.

Upstream fix: v-lawyer/docx-lite#1

Author: crishoj

crates/kreuzberg/tests/issue_359_list_whitespace_test.rs

@@ -0,0 +1,33 @@
+//! Regression test for https://github.com/kreuzberg-dev/kreuzberg/issues/359
+//!
+//! DOCX list items with multiple text runs should preserve whitespace between runs.
+//! e.g. "Sermocination ypsiliform" must not become "Sermocinationypsiliform".
+
+#![cfg(feature = "office")]
+
+use kreuzberg::{ExtractionConfig, extract_file};
+
+#[tokio::test]
+async fn test_issue_359_docx_list_run_whitespace() {
+    let workspace_root = std::path::Path::new(env!("CARGO_MANIFEST_DIR"))
+        .parent()
+        .expect("parent")
+        .parent()
+        .expect("workspace root");
+    let test_file = workspace_root.join("test_documents/docx/issue_359_list_whitespace.docx");
+
+    if !test_file.exists() {
+        println!("Skipping test: {:?} not found", test_file);
+        return;
+    }
+
+    let result = extract_file(&test_file, None, &ExtractionConfig::default())
+        .await
+        .expect("Should extract DOCX successfully");
+
+    assert!(
+        result.content.contains("Sermocination ypsiliform"),
+        "Expected 'Sermocination ypsiliform' with space between runs, got: {:?}",
+        result.content
+    );
+}