where possible, eliminate octave:: namespace qualifier inside octave namespace Affected files: file-editor-tab.cc, file-editor.cc, main-window.cc, octave-cmd.h, octave-qt-link.cc, settings-dialog.cc, call-stack.cc, environment.cc, ft-text-renderer.cc, gl2ps-print.cc, help.cc, input.cc, interpreter-private.cc, interpreter-private.h, interpreter.cc, load-path.cc, oct-hist.cc, oct-process.cc, oct-stream.cc, pager.cc, syminfo.cc, symtab.h, sysdep.cc, text-renderer.cc, utils.cc, gzip.cc, cdef-manager.cc, ov-fcn-handle.cc, ov-java.cc, jit-typeinfo.cc, oct-parse.yy, pt-eval.cc, pt-tm-const.cc, chol.cc, gsvd.cc, oct-rand.cc, oct-rand.h, randmtzig.cc, randpoisson.cc, file-ops.cc, lo-sysdep.cc, file-info.cc, oct-glob.cc, oct-sparse.cc, and url-transfer.cc.

--- a/libinterp/corefcn/interpreter-private.h	Tue May 21 19:50:59 2019 +0000
+++ b/libinterp/corefcn/interpreter-private.h	Wed May 22 13:57:30 2019 +0000
@@ -94,11 +94,11 @@
   // PARAMETER_NAMES.  Use of the latter form is discouraged.
 
   octave_value
-  get_function_handle (octave::interpreter& interp, const octave_value& arg,
+  get_function_handle (interpreter& interp, const octave_value& arg,
                        const std::string& parameter_name);
 
   octave_value
-  get_function_handle (octave::interpreter& interp, const octave_value& arg,
+  get_function_handle (interpreter& interp, const octave_value& arg,
                        const std::list<std::string>& parameter_names
                          = std::list<std::string> ());
 }