update C++ docstrings for extended histentry

Author: C.A.P. Linssen

models/clopath_synapse.h

@@ -247,8 +247,6 @@ clopath_synapse< targetidentifierT >::send( Event& e, size_t t, const CommonSyna
   std::deque< histentry_extended >::iterator start;
   std::deque< histentry_extended >::iterator finish;
 
-  // facilitation due to postsynaptic activity since last pre-synaptic spike
-
   // For a new synapse, t_lastspike_ contains the point in time of the last
   // spike. So we initially read the
   // history(t_last_spike - dendritic_delay, ..., T_spike-dendritic_delay]
@@ -261,7 +259,10 @@ clopath_synapse< targetidentifierT >::send( Event& e, size_t t, const CommonSyna
   while ( start != finish )
   {
     const double minus_dt = t_lastspike_ - ( start->t_ + dendritic_delay );
+
+    // facilitation due to postsynaptic activity since last pre-synaptic spike
     weight_ = facilitate_( weight_, start->dw_, x_bar_ * exp( minus_dt / tau_x_ ) );
+
     ++start;
   }
 

nestkernel/histentry.h

@@ -40,8 +40,7 @@ class histentry
   double t_;              //!< point in time when spike occurred (in ms)
   double Kminus_;         //!< value of Kminus at that time
   double Kminus_triplet_; //!< value of triplet STDP Kminus at that time
-  size_t
-    access_counter_; //! how often this entry was accessed (to enable removal, once read by all synapses which need it)
+  size_t access_counter_; //! how often this entry was accessed (to enable removal, once read by all synapses which need it)
 };
 
 /**
@@ -55,10 +54,9 @@ class histentry_extended
 public:
   histentry_extended( double t, double dw, size_t access_counter );
 
-  double t_; //!< point in time for the history entry spike occurred (in ms)
+  double t_; //!< point in time for the history entry (in ms)
   double dw_;
-  size_t
-    access_counter_; //! how often this entry was accessed (to enable removal, once read by all synapses which need it)
+  size_t access_counter_; //! how often this entry was accessed (to enable removal, once read by all synapses which need it)
 
   friend bool operator<( const histentry_extended he, double t );
 };