refactor: inline text alias in collect_output

The local was assigned from `ensure_str(stream)` and read exactly once
on the next line as `parts.append(text)`.  Inlining matches the
alias-inline style from fc5e1cb / 497c028 / 52e0272 — the helper name
already documents the decode step.

Co-authored-by: Ralphify <noreply@ralphify.co>

Author: 2 people

src/ralphify/_output.py

@@ -71,10 +71,9 @@ def collect_output(
     parts: list[str] = []
     for stream in (stdout, stderr):
         if stream:
-            text = ensure_str(stream)
             if parts and not parts[-1].endswith("\n"):
                 parts.append("\n")
-            parts.append(text)
+            parts.append(ensure_str(stream))
     return "".join(parts)