maint: style check C++ files in libinterp/ ahead of 7.1 release. * Cell.cc, __eigs__.cc, __ichol__.cc, __ilu__.cc, __magick_read__.cc, __qp__.cc, bitfcns.cc, bsxfun.cc, c-file-ptr-stream.h, ccolamd.cc, cellfun.cc, data.cc, debug.cc, defun-int.h, dlmread.cc, event-manager.cc, fftn.cc, file-io.cc, ft-text-renderer.cc, gl2ps-print.cc, graphics.cc, graphics.in.h, gzfstream.cc, gzfstream.h, jsondecode.cc, jsonencode.cc, latex-text-renderer.cc, ls-mat5.cc, lu.cc, mex.cc, oct-stream.cc, oct-strstrm.cc, ordqz.cc, pager.h, pr-output.cc, qz.cc, schur.cc, sparse-xdiv.cc, sparse-xpow.cc, sparse.cc, stack-frame.h, strfns.cc, svd.cc, symrcm.cc, symscope.h, sysdep.cc, text-engine.h, text-renderer.h, tril.cc, variables.h, xdiv.h, __glpk__.cc, __init_fltk__.cc, __init_gnuplot__.cc, __voronoi__.cc, audiodevinfo.cc, cdef-class.cc, cdef-class.h, cdef-manager.cc, cdef-manager.h, cdef-method.cc, cdef-object.cc, ov-base-diag.cc, ov-base-diag.h, ov-base-int.cc, ov-base-int.h, ov-base-mat.cc, ov-base-mat.h, ov-base-scalar.h, ov-base-sparse.cc, ov-base-sparse.h, ov-base.h, ov-bool-mat.cc, ov-cell.cc, ov-cell.h, ov-class.cc, ov-class.h, ov-dld-fcn.cc, ov-intx.h, ov-lazy-idx.cc, ov-lazy-idx.h, ov-mex-fcn.h, ov-perm.cc, ov-perm.h, ov-range.cc, ov-re-mat.cc, ov-re-mat.h, ov-str-mat.h, ov-struct.cc, ov-typeinfo.h, ov-usr-fcn.cc, ov.h, parse.h, pt-cell.cc, pt-stmt.cc, pt-tm-const.cc, pt-walk.cc: Style check C++ files in libinterp/ ahead of 7.1 release.

--- a/libinterp/corefcn/sysdep.cc	Mon Nov 29 11:15:15 2021 +0900
+++ b/libinterp/corefcn/sysdep.cc	Sun Nov 28 21:52:08 2021 -0800
@@ -1141,7 +1141,7 @@
     {
       octave_value key_val;
       LONG retval = get_regkey_value (h_rootkey, subkey_name,
-                                              value_name, key_val);
+                                      value_name, key_val);
       if (retval == ERROR_FILE_NOT_FOUND)
         error ("winqueryreg: no value found for '%s' at %s\\%s",
                value_name.c_str (), rootkey_name.c_str (),