Commit these future kovesi() function modifications and add one @nospecialize

Author: joa-quim

src/GMT.jl

@@ -138,7 +138,7 @@ export
 	sunsetrise, spectrum1d, sphdistance, sphinterpolate,
 	sphtriangulate, surface, ternary, ternary!, text, text!, text_record, trend1d, trend2d, triangulate, gmtsplit,
 	decorated, vector_attrib, wiggle, wiggle!, xyz2grd, gmtbegin, gmtend, gmthelp, subplot, gmtfig, inset, showfig,
-	earthtide, gmt2grd, gravfft, gmtgravmag3d, gravmag3d, grdgravmag3d, gravprisms, grdseamount, parkermag, parkergrav, ppdrc,
+	earthtide, gmt2grd, gravfft, gmtgravmag3d, gravmag3d, grdgravmag3d, gravprisms, grdseamount, parkermag, parkergrav, kovesi,
 	pscoupe, pscoupe!, coupe, coupe!, psmeca, psmeca!, meca, meca!, psvelo, psvelo!, sac, sac!, velo, velo!, gmtisf, getbyattrib,
 	inpolygon, inwhichpolygon, pcolor, pcolor!, triplot, triplot!, trisurf, trisurf!, grdrotater, imagesc, upGMT, boxes,
 	segy, segy!, segyz, segyz!, segy2grd, stereonet, stereonet!, add_opt, isgeog, numel, scan_opt, extrema_nan, parse_RIr,

src/common_options.jl

@@ -2195,7 +2195,7 @@ arg2str(arg::Nothing,       sep = '/')::String = ""
 arg2str(arg::Real,          sep = '/')::String = @sprintf("%.12g", arg)
 arg2str(arg::Symbol,        sep = '/')::String = string(arg)
 arg2str(arg::Array{<:Real}, sep = '/')::String = string(rstrip(join([string(x, sep) for x in arg]), sep))
-arg2str(arg::Tuple,         sep = '/')::String = string(rstrip(join([string(x, sep) for x in arg]), sep))
+arg2str(@nospecialize(arg::Tuple), sep = '/')::String = string(rstrip(join([string(x, sep) for x in arg]), sep))
 function arg2str(arg::Bool, sep = '/')::String
     @assert arg "arg is false!"
     arg && return ""

src/utils.jl

@@ -1697,7 +1697,7 @@ parkermag(x, y, z=""; kw...) =
 	printstyled("\tTo use this function you need to load the FFTW package first. Do:\n\tusing FFTW"; color=:yellow)
 parkergrav(x, y=""; kw...)   =
 	printstyled("\tTo use this function you need to load the FFTW package first. Do:\n\tusing FFTW"; color=:yellow)
-ppdrc(x; kw...) =
+kovesi(x; kw...) =
 	printstyled("\tTo use this function you need to load the FFTW package first. Do:\n\tusing FFTW"; color=:yellow)
 
 read_xls(x; kw...) =