lib/molecules/empirical_formula.rb in bahuvrihi-molecules-0.1.2 vs lib/molecules/empirical_formula.rb in bahuvrihi-molecules-0.2.0

@@ -297,10 +297,10 @@
     #   Spectrom. (1991) 2 336-348' 
     #   (see {Unimod Mass Help}[http://www.unimod.org/masses.html])
     # - Masses are calculated such that mathematical operations 
     #   are performed on the return of the block.
     # 
-    def mass(&block)
+    def mass(&block) # :yields: element
       if block_given? 
         mass = 0
         each {|e, n| mass = (yield(e) * n) + mass }
         mass
       else