General problem with naming conventions for WP page address links 

In "http://en.wikipedia.org/wiki/Progressive_retinal_atrophy", the link to "Siamese" is embedded as "http://en.wikipedia.org/wiki/Siamese_%28cat%29", When this link is copy-pasted into a Mac Mail new email, for example, the link is converted by Mail to "http://en.wikipedia.org/wiki/Siamese_%2528cat%2529", which is invalid (Mail replaced the percent character with its hex equivalent). Please advise your editors to avoid using special characters, or, at least, to avoid using "escape" codes, in links and anywhere else that copy-paste could result in such a conversion. For this case, the solution is simple: the name of the page shoud be "http://en.wikipedia.org/wiki/Siamese_cat". The linking page "...Progressive_retinal_atrophy", as coded, violates "http://en.wikipedia.org/wiki/Wikipedia:How_to_edit_a_page#Links_and_URLs" in the paragraph which begins, "In the URL, all symbols must be among: ...", and the paragraph which follows.