Prefer -able over -eable

The grammar rule is that the final silent "e" of the root verb is dropped,
except for root verbs ending in "ce" and "ge".

The only exceptions are:
	cachable->cacheable
	gatable->gateable
The Google Ngram Viewer shows overwhelming use of cacheable and gateable
in practice.

codespell_lib/data/dictionary.txt

@@ -36560,7 +36560,7 @@ mamory->memory
 mamuth->mammoth
 manafacturer->manufacturer
 manafacturers->manufacturers
-managable->manageable
+managable->manageable, manageably,
 managably->manageably
 managament->management
 manageed->managed