maint: Use convention 'int& x' for naming references. * ButtonGroup.cc, Canvas.cc, Canvas.h, annotation-dialog.cc, annotation-dialog.h, dialog.h, documentation-dock-widget.cc, files-dock-widget.cc, files-dock-widget.h, find-files-dialog.cc, find-files-dialog.h, find-files-model.cc, find-files-model.h, history-dock-widget.cc, history-dock-widget.h, file-editor-tab.cc, file-editor-tab.h, file-editor.cc, file-editor.h, main-window.cc, main-window.h, octave-qt-link.h, parser.cc, parser.h, webinfo.cc, webinfo.h, settings-dialog.cc, bsxfun.cc, call-stack.cc, call-stack.h, fft.cc, fft2.cc, fftn.cc, gl-render.cc, graphics.cc, graphics.in.h, input.cc, load-save.cc, ls-hdf5.cc, ls-hdf5.h, octave-link.h, pr-output.cc, regexp.cc, sparse-xdiv.cc, sparse-xdiv.h, symtab.cc, xdiv.cc, xdiv.h, zfstream.h, __eigs__.cc, __ode15__.cc, ov-base.h, ov-builtin.cc, ov-cx-sparse.h, ov-fcn-handle.cc, ov-fcn-handle.h, ov.cc, ov.h, jit-ir.h, jit-typeinfo.cc, jit-typeinfo.h, pt-jit.cc, pt-jit.h, CMatrix.cc, CMatrix.h, CSparse.cc, CSparse.h, MatrixType.cc, MatrixType.h, dDiagMatrix.cc, dMatrix.cc, dMatrix.h, dSparse.cc, dSparse.h, fCMatrix.cc, fCMatrix.h, fDiagMatrix.cc, fMatrix.cc, fMatrix.h, eigs-base.cc, oct-fftw.cc, oct-rand.h, sparse-dmsolve.cc, kpse.cc, lo-regexp.h: Use convention 'int& x' for naming references.

--- a/libgui/graphics/ButtonGroup.cc	Mon Apr 24 14:38:34 2017 -0700
+++ b/libgui/graphics/ButtonGroup.cc	Mon Apr 24 17:20:37 2017 -0700
@@ -65,7 +65,7 @@
   }
 
   static void
-  setupPalette (const uibuttongroup::properties& pp, QPalette &p)
+  setupPalette (const uibuttongroup::properties& pp, QPalette& p)
   {
     p.setColor (QPalette::Window,
                 Utils::fromRgb (pp.get_backgroundcolor_rgb ()));