Fix line endings.

Author: ZeroIntensity

Doc/c-api/interp-lifecycle.rst

@@ -619,8 +619,8 @@ it possible to avoid these issues by temporarily preventing finalization:
    will not finalize until the guard is closed (through
    :c:func:`PyInterpreterGuard_Close`).
 
-   When a guard is held, a thread attempting to finalize the interpreter will
-   block until the guard is closed before starting finalization.
+   When a guard is held, a thread attempting to finalize the interpreter will
+   block until the guard is closed before starting finalization.
    After finalization has started, threads are forever unable to acquire
    guards for that interpreter. This means that if you forget to close an
    interpreter guard, the process will **permanently hang** during