maint: Cleanup C++ code to follow Octave coding conventions. Try to wrap long lines to < 80 characters. Use GNU style and don't indent first brace of function definition. "case" statement is aligned flush left with brace of switch stmt. Remove trailing '\' line continuation from the end of #define macros. Use 2 spaces for indent. * files-dock-widget.cc, history-dock-widget.cc, main-window.cc, octave-cmd.cc, octave-dock-widget.cc, octave-gui.cc, resource-manager.cc, settings-dialog.cc, shortcut-manager.cc, welcome-wizard.cc, workspace-view.cc, cellfun.cc, data.cc, debug.cc, debug.h, dirfns.cc, error.h, file-io.cc, gl-render.cc, gl-render.h, gl2ps-renderer.h, graphics.cc, graphics.in.h, help.cc, input.cc, load-path.cc, load-path.h, lookup.cc, lu.cc, oct-stream.cc, octave-default-image.h, ordschur.cc, pr-output.cc, qz.cc, strfns.cc, symtab.cc, symtab.h, sysdep.cc, variables.cc, zfstream.h, __fltk_uigetfile__.cc, __init_fltk__.cc, __magick_read__.cc, __osmesa_print__.cc, audiodevinfo.cc, ov-classdef.cc, ov-classdef.h, ov-fcn.h, ov-float.cc, ov-flt-complex.cc, ov-java.cc, ov-range.cc, ov-re-mat.cc, ov-usr-fcn.h, ov.cc, op-int.h, options-usage.h, pt-eval.cc, Array-C.cc, Array-fC.cc, Array.cc, Array.h, PermMatrix.cc, Sparse.cc, chMatrix.h, dSparse.cc, dim-vector.h, bsxfun-decl.h, bsxfun-defs.cc, oct-norm.cc, Sparse-op-defs.h, oct-inttypes.cc, oct-inttypes.h, main.in.cc, mkoctfile.in.cc: Cleanup C++ code to follow Octave coding conventions.

--- a/libinterp/corefcn/debug.h
+++ b/libinterp/corefcn/debug.h
@@ -62,7 +62,7 @@
                                 const intmap& lines = intmap ())
   {
     return instance_ok ()
-      ? instance->do_add_breakpoint (fname, lines) : intmap ();
+           ? instance->do_add_breakpoint (fname, lines) : intmap ();
   }
 
   // Remove a breakpoint from a line in file.
@@ -70,7 +70,7 @@
                                 const intmap& lines = intmap ())
   {
     return instance_ok ()
-      ? instance->do_remove_breakpoint (fname, lines) : 0;
+           ? instance->do_remove_breakpoint (fname, lines) : 0;
   }
 
   // Remove all the breakpoints in a specified file.
@@ -78,7 +78,8 @@
                                                 bool silent = false)
   {
     return instance_ok ()
-      ? instance->do_remove_all_breakpoints_in_file (fname, silent) : intmap ();
+           ? instance->do_remove_all_breakpoints_in_file (fname, silent)
+           : intmap ();
   }
 
   // Remove all the breakpoints registered with octave.
@@ -94,7 +95,7 @@
   get_breakpoint_list (const octave_value_list& fname_list)
   {
     return instance_ok ()
-      ? instance->do_get_breakpoint_list (fname_list) : fname_line_map ();
+           ? instance->do_get_breakpoint_list (fname_list) : fname_line_map ();
   }
 
   static bool