maint: Use "fcn" as preferred abbreviation for "function" in m-files. * accumarray.m, accumdim.m, quadl.m, quadv.m, randi.m, structfun.m, __is_function__.m, uigetfile.m, uimenu.m, uiputfile.m, doc_cache_create.m, colorspace_conversion_input_check.m, imageIO.m, argnames.m, vectorize.m, vectorize.m, normest1.m, inputname.m, nthargout.m, display_info_file.m, decic.m, ode15i.m, ode15s.m, ode23.m, ode23s.m, ode45.m, odeset.m, check_default_input.m, integrate_adaptive.m, ode_event_handler.m, runge_kutta_23.m, runge_kutta_23s.m, runge_kutta_45_dorpri.m, runge_kutta_interpolate.m, starting_stepsize.m, __all_opts__.m, fminbnd.m, fminsearch.m, fminunc.m, fsolve.m, fzero.m, sqp.m, fplot.m, plotyy.m, __bar__.m, __ezplot__.m, flat_entry.html, profexport.m, movfun.m, bicg.m, bicgstab.m, cgs.m, eigs.m, gmres.m, pcg.m, __alltohandles__.m, __sprand__.m, qmr.m, tfqmr.m, dump_demos.m: Replace "func", "fun", "fn" in documentation and variable names with "fcn".

--- a/scripts/gui/uimenu.m	Mon Apr 04 11:22:26 2022 -0700
+++ b/scripts/gui/uimenu.m	Mon Apr 04 18:14:56 2022 -0700
@@ -40,9 +40,9 @@
 ##
 ## @item @qcode{"callback"}
 ## Is the function called when this menu entry is executed.  It can be either a
-## function string (e.g., @qcode{"myfun"}), a function handle (e.g., @@myfun)
+## function string (e.g., @qcode{"myfcn"}), a function handle (e.g., @@myfcn)
 ## or a cell array containing the function handle and arguments for the
-## callback function (e.g., @{@@myfun, arg1, arg2@}).
+## callback function (e.g., @{@@myfcn, arg1, arg2@}).
 ##
 ## @item @qcode{"checked"}
 ## Can be set @qcode{"on"} or @qcode{"off"}.  Sets a mark at this menu entry.