GI: fix tests and add comments to generation scripts

GI/test/runtests.jl

@@ -20,9 +20,6 @@ e=ns[:Application]
 
 show(e)
 
-d = GI.prop_dict(e)
-@test length(d)==length(GI.get_properties(e))
-
 a=ns[:Action]
 @test length(GI.get_properties(a))==5
 

gen/gen_all.jl

@@ -1,15 +1,14 @@
 using gobject_introspection_jll, gdk_pixbuf_jll
 using GI
+
+# Generates code for libraries where introspection data is present in JLL's
+# This should work on any Linux machine
+
 GI.prepend_search_path(gobject_introspection_jll)
 GI.prepend_search_path(gdk_pixbuf_jll)
 include("gen_glib.jl")
 include("gen_gobject.jl")
 include("gen_gio.jl")
 include("gen_cairo.jl")
-#include("gen_pango.jl")
-#include("gen_pangocairo.jl")
 include("gen_gdkpixbuf.jl")
-#include("gen_graphene.jl")
-#include("gen_gsk.jl")
-#include("gen_gdk4.jl")
-#include("gen_gtk4.jl")
+

gen/gen_rest.jl

@@ -1,4 +1,9 @@
 using GI, EzXML
+
+# Generates code for libraries where we use introspection data outside JLL's
+# This code is typically run on a recent version of Fedora where the library
+# version is the same or close to what's present in Yggdrasil.
+
 GI.prepend_search_path("/usr/lib64/girepository-1.0")
 include("gen_pango.jl")
 include("gen_pangocairo.jl")