lib/y_petri/place/guarded.rb in y_petri-2.3.3 vs lib/y_petri/place/guarded.rb in y_petri-2.3.4

@@ -3,24 +3,24 @@
 # Support of places' marking guards.
 # 
 module YPetri::Place::Guarded
   # Expects a guard assertion in natural language, and a guard block. Guard
   # block is a unary block that validates marking. A validation fails when:
-  #
+  # 
   # 1. The block returns _false_.
   # 2. The block raises +YPetri::GuardError+.
-  #
+  # 
   # In all other cases, including when the block returns _nil_ (beware!),
   # the marking is considered valid! Inside the block, +#fail+ keyword is
   # redefined so that it can (and must) be called without arguments, and it
   # raises an appropriately worded +GuardError+. (Other exceptions can still
   # be raised using +#raise+ keyword.) Practical example:
-  #
+  # 
   #   guard "should be a number" do |m| fail unless m.is_a? Numeric end
-  #
+  # 
   # Then <code>guard! :foobar</code> raises +GuardError+ with a message "Marking
   # foobar:Symbol should be a number!"
-  #
+  # 
   # Finally, this method is overloaded in such way, that if no block is
   # given to it, it acts as an alias of +#common_guard_closure+ method.
   # 
   def guard *args, &block
     if block then