fix(integrations): cline hook note collapses onto instruction at EOF (#3263)

The hook-note injection regex matches the line terminator via
(\r\n|\n|$), so the captured eol group is empty when the instruction
is the final line of a file with no trailing newline. The cline
integration emitted the note with that empty eol, mashing the note text
and the instruction onto a single line. Default eol to '\n', matching
the agy integration twin which already guards this case.

Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>

src/specify_cli/integrations/cline/__init__.py

@@ -96,7 +96,11 @@ class ClineIntegration(MarkdownIntegration):
         def repl(m: re.Match[str]) -> str:
             indent = m.group(1)
             instruction = m.group(2)
-            eol = m.group(3)
+            # ``eol`` is empty when the regex matched via ``$`` because the
+            # instruction was the final line of a file with no trailing
+            # newline. Default to ``\n`` so the note never collapses onto
+            # the same line as the instruction.
+            eol = m.group(3) or "\n"
             return (
                 indent
                 + _HOOK_COMMAND_NOTE.rstrip("\n")

tests/integrations/test_integration_cline.py

@@ -90,6 +90,22 @@ class TestClineIntegration(MarkdownIntegrationTests):
         assert "replace dots (`.`) with hyphens (`-`)" in injected
         assert "- For each executable hook, output the following:" in injected
 
+    def test_cline_hook_instruction_injection_no_trailing_newline(self):
+        """Note must not collapse onto the instruction line when the
+        instruction is the final line with no trailing newline.
+
+        The injection regex matches the end-of-line via ``(\\r\\n|\\n|$)``, so
+        the captured ``eol`` is empty on a file's last line that lacks a
+        trailing newline. Without an ``or "\\n"`` fallback the note text and
+        the instruction are emitted on the same line.
+        """
+        cline = get_integration("cline")
+        content = "- For each executable hook, output the following:"  # no trailing \n
+        injected = cline._inject_hook_command_note(content)
+        assert "replace dots (`.`) with hyphens (`-`)" in injected
+        # Instruction stays on its own line rather than being mashed onto the note.
+        assert "\n- For each executable hook, output the following:" in injected
+
     # -- Overrides for MarkdownIntegrationTests ---------------------------
 
     def test_setup_creates_files(self, tmp_path):