updated all .editorconfig files visual guides to 100; using convention of :all and t/ in math test files; added 'is' to test.core

Author: marke000

.editorconfig

@@ -15,7 +15,7 @@ ij_visual_guides = 100
 ij_wrap_on_typing = false
 
 [{*.clj,*.cljd}]
-ij_visual_guides = 80
+ij_visual_guides = 100
 ij_clojure_alignbindingforms = false
 ij_clojure_alignmapvalues = true
 ij_clojure_alignreaderconditionals = true