maint: C++ style check for libinterp/ before 9.1 release. * libinterp/corefcn/__ichol__.cc, libinterp/corefcn/__ilu__.cc, libinterp/corefcn/bsxfun.cc, libinterp/corefcn/call-stack.cc, libinterp/corefcn/defaults.cc, libinterp/corefcn/environment.cc, libinterp/corefcn/error.cc, libinterp/corefcn/event-manager.cc, libinterp/corefcn/ft-text-renderer.cc, libinterp/corefcn/gl-render.cc, libinterp/corefcn/graphics-utils.cc, libinterp/corefcn/graphics.cc, libinterp/corefcn/graphics.in.h, libinterp/corefcn/help.cc, libinterp/corefcn/hook-fcn.cc, libinterp/corefcn/input.cc, libinterp/corefcn/interpreter-private.cc, libinterp/corefcn/interpreter.cc, libinterp/corefcn/load-path.cc, libinterp/corefcn/load-save.cc, libinterp/corefcn/ls-hdf5.cc, libinterp/corefcn/lu.cc, libinterp/corefcn/mex.cc, libinterp/corefcn/oct-hist.cc, libinterp/corefcn/oct-map.cc, libinterp/corefcn/oct-stream.cc, libinterp/corefcn/pager.cc, libinterp/corefcn/perms.cc, libinterp/corefcn/pr-output.cc, libinterp/corefcn/qr.cc, libinterp/corefcn/settings.cc, libinterp/corefcn/sparse-xdiv.cc, libinterp/corefcn/stack-frame.cc, libinterp/corefcn/syminfo.cc, libinterp/corefcn/symrcm.cc, libinterp/corefcn/symscope.cc, libinterp/corefcn/symtab.cc, libinterp/corefcn/sysdep.cc, libinterp/corefcn/tsearch.cc, libinterp/corefcn/url-handle-manager.cc, libinterp/corefcn/utils.cc, libinterp/corefcn/xnorm.cc, libinterp/dldfcn/__init_fltk__.cc, libinterp/octave-value/ov-base.cc, libinterp/octave-value/ov-bool-mat.cc, libinterp/octave-value/ov-cell.cc, libinterp/octave-value/ov-ch-mat.cc, libinterp/octave-value/ov-class.cc, libinterp/octave-value/ov-classdef.cc, libinterp/octave-value/ov-fcn-handle.cc, libinterp/octave-value/ov-fcn-handle.h, libinterp/octave-value/ov-fcn.h, libinterp/octave-value/ov-inline.h, libinterp/octave-value/ov-lazy-idx.cc, libinterp/octave-value/ov-range.cc, libinterp/octave-value/ov-range.h, libinterp/octave-value/ov-typeinfo.cc, libinterp/octave-value/ov-usr-fcn.cc, libinterp/octave-value/ov.cc, libinterp/octave.cc, libinterp/parse-tree/anon-fcn-validator.cc, libinterp/parse-tree/bp-table.cc, libinterp/parse-tree/oct-lvalue.cc, libinterp/parse-tree/pt-classdef.cc, libinterp/parse-tree/pt-colon.cc, libinterp/parse-tree/pt-eval.cc, libinterp/parse-tree/pt-eval.h, libinterp/parse-tree/pt-tm-const.cc, libinterp/parse-tree/pt-walk.cc: C++ style check for libinterp/ before 9.1 release.

--- a/libinterp/corefcn/symrcm.cc	Mon Dec 11 18:28:46 2023 -0500
+++ b/libinterp/corefcn/symrcm.cc	Tue Dec 12 18:24:05 2023 -0800
@@ -334,7 +334,7 @@
 
 static octave_idx_type
 calc_degrees (octave_idx_type N, octave_idx_type *cidx, octave_idx_type *ridx,
-            octave_idx_type *cidx2, octave_idx_type *ridx2, octave_idx_type *D)
+              octave_idx_type *cidx2, octave_idx_type *ridx2, octave_idx_type *D)
 {
   octave_idx_type max_deg = 0;
   for (octave_idx_type i = 0; i < N; i++)