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")