Update include/seqan3/alphabet/composite/alphabet_variant.hpp

Co-authored-by: simonsasse <[email protected]>

include/seqan3/alphabet/composite/alphabet_variant.hpp

@@ -607,7 +607,7 @@ class alphabet_variant : public alphabet_base<alphabet_variant<alternative_types
 
     /*!\brief Compile-time generated lookup table which maps the char to rank.
      *
-     * An map generated at compile time where the key is the char of one of the
+     * A map generated at compile time where the key is the char of one of the
      * alternatives and the value is the corresponding rank over all alternatives (by
      * conflict will default to the first).
      *