Use semicolon after "return" statement in core m-files. * scripts/general/accumdim.m, scripts/image/imformats.m, scripts/io/textread.m, scripts/io/textscan.m, scripts/linear-algebra/expm.m, scripts/miscellaneous/edit.m, scripts/optimization/lsqnonneg.m, scripts/optimization/pqpnonneg.m, scripts/pkg/private/dirempty.m, scripts/plot/findobj.m, scripts/plot/graphics_toolkit.m, scripts/plot/private/__errplot__.m, scripts/plot/private/__interp_cube__.m, scripts/plot/private/__marching_cube__.m, scripts/plot/subplot.m, scripts/polynomial/residue.m, scripts/sparse/sprandsym.m, scripts/special-matrix/gallery.m, scripts/strings/strjoin.m: Use semicolon after "return" statement in core m-files.

--- a/scripts/polynomial/residue.m
+++ b/scripts/polynomial/residue.m
@@ -160,7 +160,7 @@
     ## The inputs are the residue, pole, and direct part. Solve for the
     ## corresponding numerator and denominator polynomials
     [r, p] = rresidue (b, a, varargin{1}, toler, e);
-    return
+    return;
   endif
 
   ## Make sure both polynomials are in reduced form.