If a word or phrase appears in an article in single-quotes, such as 'abcd', the [[Wikipedia:Searching]] facility considers the single-quotes to be part of the word and will find that word or phrase only if the search string is also within single-quotes. (When trying this out with the example mentioned, remember that this article is in the Wikipedia namespace.) Avoiding this complication is an additional reason to use double-quotes, for which the difficulty does not arise. It may even be a reason to use double-quotes for quotations within quotations.
+
If a word or phrase appears in an article in single-quotes, such as 'abcd', the [[Centiare:Searching]] facility considers the single-quotes to be part of the word and will find that word or phrase only if the search string is also within single-quotes. (When trying this out with the example mentioned, remember that this article is in the Centiare namespace.) Avoiding this complication is an additional reason to use double-quotes, for which the difficulty does not arise. It may even be a reason to use double-quotes for quotations within quotations.