pr OK

Author: richardnm-2

src/lib/sort_traces.js

@@ -111,7 +111,7 @@ function transpose(matrix) {
 
     var newMatrix = [];
 
-    // prevent inplace change
+    // prevent inplace change and mantain the main diagonal
     for(var rw = 0; rw < squaredMatrix.length; rw++) {
         newMatrix.push(squaredMatrix[rw].slice());
     }

src/plots/cartesian/axes.js

@@ -2577,9 +2577,9 @@ axes.drawOne = function(gd, ax, opts) {
 
         if(ax.automargin || hasRangeSlider) {
             if(ax.type === 'multicategory') {
-                llbbox = getLabelLevelBbox('tick' + String(ax.levelNr - 1));
-                // hardcoded tick name, breakes only with plotly.py
+                // hardcoded tick name, breakes only with plotly.py. Not sure if this is the right selection
                 // llbbox = getLabelLevelBbox('tick2');
+                llbbox = getLabelLevelBbox('tick' + String(ax.levelNr - 1));
             } else {
                 llbbox = getLabelLevelBbox();
                 if(axLetter === 'x' && s === 'b') {
@@ -3784,7 +3784,6 @@ function drawDividers(gd, ax, opts) {
     var cls = ax._id + 'divider';
     var vals = opts.vals;
 
-
     var dividers = opts.layer.selectAll('path.' + cls)
     .data(vals, tickDataFn);