eliminate octave:: namespace tags in DEFUN and DEFMETHOD and more Files affected: __betainc__.cc, __contourc__.cc, __eigs__.cc, __expint__.cc, __ftp__.cc, __gammainc__.cc, __ichol__.cc, __ilu__.cc, __magick_read__.cc, __pchip_deriv__.cc, __qp__.cc, amd.cc, balance.cc, besselj.cc, bsxfun.cc, call-stack.cc, ccolamd.cc, cellfun.cc, chol.cc, colamd.cc, colloc.cc, conv2.cc, daspk.cc, dasrt.cc, dassl.cc, data.cc, defaults.cc, dirfns.cc, display.cc, dlmread.cc, dmperm.cc, dot.cc, eig.cc, ellipj.cc, environment.cc, error.cc, event-manager.cc, fft.cc, fft2.cc, fftn.cc, file-io.cc, find.cc, gcd.cc, getgrent.cc, getpwent.cc, getrusage.cc, gsvd.cc, hash.cc, help.cc, hess.cc, hex2num.cc, input.cc, inv.cc, jsondecode.cc, jsonencode.cc, load-path.cc, load-save.cc, lookup.cc, lsode.cc, lu.cc, max.cc, mgorth.cc, oct-hist.cc, ordqz.cc, ordschur.cc, pager.cc, pr-output.cc, psi.cc, qr.cc, quad.cc, quadcc.cc, qz.cc, rand.cc, regexp.cc, schur.cc, settings.cc, sighandlers.cc, sparse.cc, spparms.cc, sqrtm.cc, stream-euler.cc, strfind.cc, strfns.cc, sub2ind.cc, svd.cc, symbfact.cc, symtab.cc, syscalls.cc, sysdep.cc, time.cc, toplev.cc, tril.cc, typecast.cc, urlwrite.cc, utils.cc, variables.cc, __delaunayn__.cc, __fltk_uigetfile__.cc, __glpk__.cc, __init_gnuplot__.cc, __ode15__.cc, __voronoi__.cc, audiodevinfo.cc, audioread.cc, convhulln.cc, fftw.cc, gzip.cc, ov-cell.cc, ov-class.cc, ov-classdef.cc, ov-fcn-handle.cc, ov-struct.cc, ov-typeinfo.cc, ov-usr-fcn.cc, octave.cc, lex.ll, oct-parse.yy, profiler.cc, andpt-eval.cc.

--- a/libinterp/corefcn/__betainc__.cc	Sat Aug 14 21:50:26 2021 -0400
+++ b/libinterp/corefcn/__betainc__.cc	Sat Aug 14 22:48:52 2021 -0400
@@ -79,7 +79,7 @@
         b = args(2).float_array_value ();
 
       // Initialize variables used in algorithm
-      static const float tiny = octave::math::exp2 (-50.0f);
+      static const float tiny = math::exp2 (-50.0f);
       static const float eps = std::numeric_limits<float>::epsilon ();
       float xj, x2, y, Cj, Dj, aj, bj, Deltaj, alpha_j, beta_j;
       int j, maxit;
@@ -150,7 +150,7 @@
         b = args(2).array_value ();
 
       // Initialize variables used in algorithm
-      static const double tiny = octave::math::exp2 (-100.0);
+      static const double tiny = math::exp2 (-100.0);
       static const double eps = std::numeric_limits<double>::epsilon ();
       double xj, x2, y, Cj, Dj, aj, bj, Deltaj, alpha_j, beta_j;
       int j, maxit;