maint: Use phrase "FIXME:" for problem areas in code. * libinterp/corefcn/betainc.cc, libinterp/corefcn/bitfcns.cc, libinterp/corefcn/display.cc, libinterp/corefcn/gammainc.cc, libinterp/corefcn/gl2ps-renderer.cc, libinterp/corefcn/graphics.cc, libinterp/corefcn/load-save.cc, libinterp/corefcn/ls-hdf5.cc, libinterp/corefcn/ls-mat5.cc, libinterp/corefcn/ls-oct-binary.cc, libinterp/corefcn/luinc.cc, libinterp/corefcn/mex.cc, libinterp/corefcn/regexp.cc, libinterp/corefcn/sighandlers.cc, libinterp/corefcn/sparse-xpow.cc, libinterp/corefcn/urlwrite.cc, libinterp/corefcn/variables.cc, libinterp/dldfcn/__init_fltk__.cc, libinterp/dldfcn/__magick_read__.cc, libinterp/dldfcn/chol.cc, libinterp/octave-value/ov-bool-sparse.cc, libinterp/octave-value/ov-fcn-inline.cc, libinterp/octave-value/ov-flt-re-mat.cc, libinterp/octave-value/ov-re-mat.cc, libinterp/octave-value/ov-str-mat.cc, libinterp/parse-tree/lex.ll, liboctave/numeric/SparseCmplxQR.cc, liboctave/numeric/SparseQR.cc, liboctave/numeric/sparse-dmsolve.cc, liboctave/util/lo-utils.cc, liboctave/util/sparse-util.cc, liboctave/util/url-transfer.cc: maint: Use phrase "FIXME:" for problem areas in code.

--- a/libinterp/corefcn/gl2ps-renderer.cc
+++ b/libinterp/corefcn/gl2ps-renderer.cc
@@ -157,8 +157,8 @@
   gl2psTextOpt (txt.c_str (), fontname.c_str (), fontsize,
                 alignment_to_mode (ha, va), rotation);
 
-  // FIXME? -- we have no way of getting a bounding box from gl2ps, so
-  // we use freetype
+  // FIXME?
+  // We have no way of getting a bounding box from gl2ps, so we use freetype.
   Matrix bbox;
   uint8NDArray pixels;
   text_to_pixels (txt, pixels, bbox, 0, 0, rotation);