Commit 2f0c68f23b added an extra @section
.cfi_lsda:
@subsection @code{.cfi_lsda @var{encoding} [, @var{exp}]}
+@section @code{.cfi_lsda @var{encoding} [, @var{exp}]}
@code{.cfi_lsda} defines LSDA and its encoding.
It shouldn't be there.
* doc/as.texinfo (.cfi_lsda): Remove the extra @section.