DOC: update README re suff_only

README.md

@@ -219,8 +219,8 @@ is also implemented in
 [Gepard](https://cube.univie.ac.at/gepard)
 ([Krumsiek _et al._ 2007](https://academic.oup.com/bioinformatics/article/23/8/1026/198110)).
 (Eventually I moved from directly using suffix arrays to just using the
-`pydivsufsort.common_substrings()` algorithm, but admittedly that is still
-[using a suffix array under the hood](https://github.com/louisabraham/pydivsufsort/blob/2869020c26022e0f88592e85cdc480856e9856d5/pydivsufsort/wonderstring.py#L128-L157).)
+`pydivsufsort.common_substrings()` algorithm, at least as the default. Although
+that is still [using a suffix array under the hood](https://github.com/louisabraham/pydivsufsort/blob/2869020c26022e0f88592e85cdc480856e9856d5/pydivsufsort/wonderstring.py#L128-L157) :)
 
 ### Dependencies