maint: Use Octave coding convention of space between function name and parentheses in libgui/. * libgui/graphics/BaseControl.cc, libgui/graphics/Canvas.cc, libgui/graphics/Figure.cc, libgui/graphics/FigureWindow.cc, libgui/graphics/FigureWindow.h, libgui/graphics/QtHandlesUtils.cc, libgui/graphics/Table.h, libgui/graphics/annotation-dialog.cc, libgui/graphics/gl-select.cc, libgui/src/command-widget.cc, libgui/src/dialog.cc, libgui/src/documentation-bookmarks.cc, libgui/src/documentation.cc, libgui/src/dw-main-window.cc, libgui/src/files-dock-widget.cc, libgui/src/gui-settings.cc, libgui/src/gui-settings.h, libgui/src/gui-utils.cc, libgui/src/led-indicator.cc, libgui/src/m-editor/file-editor-tab.cc, libgui/src/m-editor/find-dialog.cc, libgui/src/m-editor/octave-qscintilla.cc, libgui/src/main-window.cc, libgui/src/main-window.h, libgui/src/octave-dock-widget.cc, libgui/src/set-path-dialog.cc, libgui/src/set-path-model.cc, libgui/src/settings-dialog.cc, libgui/src/tab-bar.cc, libgui/src/tab-bar.h, libgui/src/terminal-dock-widget.cc, libgui/src/variable-editor-model.cc, libgui/src/variable-editor-model.h, libgui/src/variable-editor.cc, libgui/src/workspace-model.h, libgui/src/workspace-view.cc: Use Octave coding convention of space between function name and parentheses.

To cite GNU Octave in publications use:

  John W. Eaton, David Bateman, Søren Hauberg, Rik Wehbring (2024).
  GNU Octave version 9.1.0 manual: a high-level interactive language for
  numerical computations.
  URL https://www.gnu.org/software/octave/doc/v9.1.0/

A BibTeX entry for LaTeX users is:

  @manual{,
    title     = {{GNU Octave} version 9.1.0 manual: a high-level interactive language for numerical computations},
    author    = {John W. Eaton and David Bateman and S{\o}ren Hauberg and Rik Wehbring},
    year      = {2024},
    url       = {https://www.gnu.org/software/octave/doc/v9.1.0/},
  }

We have invested a lot of time and effort in creating GNU Octave, please
cite it when using it.  See also 'citation pkgname' for citing Octave packages.