diff --git a/pub/lib/plot.cpp b/pub/lib/plot.cpp
index 77a28ef8b3ea6404b39d6f84ca73c0e32096066b..c04618b7db9ac42af3aeab59050934aa98f92af8 100644
--- a/pub/lib/plot.cpp
+++ b/pub/lib/plot.cpp
@@ -147,9 +147,8 @@ int plot_data( CPlot* plot, ROld fd, int k, int j, int pstyle )
             if ( !plot->Y.force )
                 continue;
         }
-        if ( np==plot->maxpoints && np<n ) {
+        if ( np==plot->maxpoints && np<n )
             cout << "reached maxpoints at " << s->x[i] << "\n";
-        }
         xp.push_back( x );
         yp.push_back( y );
         if ( s->has_dy() )
@@ -203,8 +202,7 @@ int plot_curve_convolved( CPlot* plot, ROlc fc, int k, int j, int cstyle )
         yo.push_back( yp );
     }
     if ( xo.size()==0 ){
-        cout << "curve k="<<S(k)<<", j="<<S(j)<<
-            " has no points in plot window\n";
+        cout << "curve k="<<S(k)<<", j="<<S(j)<< " has no points in plot window\n";
     }
     plot->add_spec( true, true, cstyle, xo, yo, novec, fc->V[j]->z_str(),
                    fc->xco.str_std(), fc->yco.str_std(),
@@ -285,8 +283,7 @@ int plot_curve_refine( CPlot* plot, ROlc fc, int k, int j, int cstyle )
         if ( !xc.size() ){
             if ( !iref )
                 throw S("BUG: plot_curve_refine called with xc.size()=0");
-            else
-                break; // regular exit
+            break; // regular exit
         }
         // evaluate curve for grid xc:
         RObjVecDbl cu = PCAST<const CObjVecDbl>( fc->eval_curve( xc, k, j, false ) );
@@ -322,11 +319,6 @@ int plot_curve_refine( CPlot* plot, ROlc fc, int k, int j, int cstyle )
             }
             xn = xa; yn = ya;
         }
-        // cout << "DEB merger -> " << xn.size() << "\n";
-        // for ( int i=0; i<xn.size(); ++i )
-        // printf ("DEB xn yn %12.6g %12.6g\n", xn[i], yn[i] );
-
-        // end of loop
         if ( iref>=10 || xn.size()>=plot->maxpoints )
             break; // alternate exit: too many refinements or too many points
 
@@ -354,9 +346,6 @@ int plot_curve_refine( CPlot* plot, ROlc fc, int k, int j, int cstyle )
         xa.push_back( xn.back() );
         ya.push_back( yn.back() );
         xn = xa; yn = ya;
-        // cout << "DEB within frame -> " << xn.size() << "\n";
-        // for ( int i=0; i<xn.size(); ++i )
-        // printf ("DEB xy %12.6g %12.6g\n", xn[i], yn[i] );
 
         // set additional base points:
         bool insert_next = false;
@@ -368,22 +357,17 @@ int plot_curve_refine( CPlot* plot, ROlc fc, int k, int j, int cstyle )
                     (xn[i+1]-xn[i-1]);
                 if ( !plot->Y.close_enough( yn[i], yi, 0.005 ) ) {
                     xc.push_back( (xn[i-1] + xn[i])/2 );
-                    // cout << "DEB disc " << xc.back() << "\n";
                     insert_next = true;
                     continue;
                 }
             }
             if ( insert_next ) {
                 xc.push_back( (xn[i-1] + xn[i])/2 );
-                // cout << "DEB next " << xc.back() << "\n";
                 insert_next = false;
                 continue;
             }
-            if ( ( plot->Y.contains(yn[i]) &&
-                   !plot->Y.contains(yn[i-1]) ) ||
-                 ( !plot->Y.contains(yn[i]) &&
-                   plot->Y.contains(yn[i-1]) ) ) {
-                // cout << "DEB edge " << xc.back() << "\n";
+            if ( ( plot->Y.contains(yn[i]) && !plot->Y.contains(yn[i-1]) ) ||
+                 ( !plot->Y.contains(yn[i]) && plot->Y.contains(yn[i-1]) ) ) {
                 xc.push_back( (xn[i-1] + xn[i])/2 );
                 continue;
             }
@@ -407,7 +391,6 @@ int plot_curve_refine( CPlot* plot, ROlc fc, int k, int j, int cstyle )
         if ( !plot->Y.contains(yn[i]) || i==xn.size()-1 ) {
             npts += xa.size();
             if ( xa.size() ){
-                // cout << "DEB segment -> " << xa.size() << "\n";
                 plot->add_spec(
                     true, first_seg, cstyle, xa, ya, novec, fc->V[j]->z_str(),
                     fc->xco.str_std(), fc->yco.str_std(),
@@ -490,7 +473,6 @@ void NPlot::plot( class CPlot *plot, bool add, const string& mode )
             if        ( fd ) {
                 if ( !plot_data( plot, fd, k, j, pstyle ) )
                     continue;
-
             } else if ( fc ) {
                 if        ( fc->kconv!=-1 ) {
                     if ( !plot_curve_convolved( plot, fc, k, j, cstyle ) )
@@ -505,10 +487,8 @@ void NPlot::plot( class CPlot *plot, bool add, const string& mode )
                     if ( !plot_curve_refine( plot, fc, k, j, cstyle ) )
                         continue;
                 }
-
-            } else {
+            } else
                 throw S("PROGRAM ERROR plot: unexpected file type");
-            }
 
             if        ( fd ) {
                 plot->doc_PtTxLine( "  " + f->info_line( j ), pstyle );