diff --git a/docs/pyerrors/obs.html b/docs/pyerrors/obs.html
index 7260bd00..7da0c303 100644
--- a/docs/pyerrors/obs.html
+++ b/docs/pyerrors/obs.html
@@ -828,7 +828,7 @@
             <span class="n">tmp</span> <span class="o">=</span> <span class="p">[]</span>
             <span class="k">for</span> <span class="n">r</span><span class="p">,</span> <span class="n">r_name</span> <span class="ow">in</span> <span class="nb">enumerate</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">e_content</span><span class="p">[</span><span class="n">e_name</span><span class="p">]):</span>
                 <span class="k">if</span> <span class="n">expand</span><span class="p">:</span>
-                    <span class="n">tmp</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">_expand_deltas</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">deltas</span><span class="p">[</span><span class="n">r_name</span><span class="p">],</span> <span class="bp">self</span><span class="o">.</span><span class="n">idl</span><span class="p">[</span><span class="n">r_name</span><span class="p">],</span> <span class="bp">self</span><span class="o">.</span><span class="n">shape</span><span class="p">[</span><span class="n">r_name</span><span class="p">])</span> <span class="o">+</span> <span class="bp">self</span><span class="o">.</span><span class="n">r_values</span><span class="p">[</span><span class="n">r_name</span><span class="p">])</span>
+                    <span class="n">tmp</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">_expand_deltas</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">deltas</span><span class="p">[</span><span class="n">r_name</span><span class="p">],</span> <span class="nb">list</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">idl</span><span class="p">[</span><span class="n">r_name</span><span class="p">]),</span> <span class="bp">self</span><span class="o">.</span><span class="n">shape</span><span class="p">[</span><span class="n">r_name</span><span class="p">])</span> <span class="o">+</span> <span class="bp">self</span><span class="o">.</span><span class="n">r_values</span><span class="p">[</span><span class="n">r_name</span><span class="p">])</span>
                 <span class="k">else</span><span class="p">:</span>
                     <span class="n">tmp</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">deltas</span><span class="p">[</span><span class="n">r_name</span><span class="p">]</span> <span class="o">+</span> <span class="bp">self</span><span class="o">.</span><span class="n">r_values</span><span class="p">[</span><span class="n">r_name</span><span class="p">])</span>
                 <span class="n">r_length</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="nb">len</span><span class="p">(</span><span class="n">tmp</span><span class="p">[</span><span class="o">-</span><span class="mi">1</span><span class="p">]))</span>
@@ -2414,7 +2414,7 @@
             <span class="n">tmp</span> <span class="o">=</span> <span class="p">[]</span>
             <span class="k">for</span> <span class="n">r</span><span class="p">,</span> <span class="n">r_name</span> <span class="ow">in</span> <span class="nb">enumerate</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">e_content</span><span class="p">[</span><span class="n">e_name</span><span class="p">]):</span>
                 <span class="k">if</span> <span class="n">expand</span><span class="p">:</span>
-                    <span class="n">tmp</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">_expand_deltas</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">deltas</span><span class="p">[</span><span class="n">r_name</span><span class="p">],</span> <span class="bp">self</span><span class="o">.</span><span class="n">idl</span><span class="p">[</span><span class="n">r_name</span><span class="p">],</span> <span class="bp">self</span><span class="o">.</span><span class="n">shape</span><span class="p">[</span><span class="n">r_name</span><span class="p">])</span> <span class="o">+</span> <span class="bp">self</span><span class="o">.</span><span class="n">r_values</span><span class="p">[</span><span class="n">r_name</span><span class="p">])</span>
+                    <span class="n">tmp</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">_expand_deltas</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">deltas</span><span class="p">[</span><span class="n">r_name</span><span class="p">],</span> <span class="nb">list</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">idl</span><span class="p">[</span><span class="n">r_name</span><span class="p">]),</span> <span class="bp">self</span><span class="o">.</span><span class="n">shape</span><span class="p">[</span><span class="n">r_name</span><span class="p">])</span> <span class="o">+</span> <span class="bp">self</span><span class="o">.</span><span class="n">r_values</span><span class="p">[</span><span class="n">r_name</span><span class="p">])</span>
                 <span class="k">else</span><span class="p">:</span>
                     <span class="n">tmp</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">deltas</span><span class="p">[</span><span class="n">r_name</span><span class="p">]</span> <span class="o">+</span> <span class="bp">self</span><span class="o">.</span><span class="n">r_values</span><span class="p">[</span><span class="n">r_name</span><span class="p">])</span>
                 <span class="n">r_length</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="nb">len</span><span class="p">(</span><span class="n">tmp</span><span class="p">[</span><span class="o">-</span><span class="mi">1</span><span class="p">]))</span>
@@ -3512,7 +3512,7 @@ saves the figure to a file named 'save' if.</li>
             <span class="n">tmp</span> <span class="o">=</span> <span class="p">[]</span>
             <span class="k">for</span> <span class="n">r</span><span class="p">,</span> <span class="n">r_name</span> <span class="ow">in</span> <span class="nb">enumerate</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">e_content</span><span class="p">[</span><span class="n">e_name</span><span class="p">]):</span>
                 <span class="k">if</span> <span class="n">expand</span><span class="p">:</span>
-                    <span class="n">tmp</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">_expand_deltas</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">deltas</span><span class="p">[</span><span class="n">r_name</span><span class="p">],</span> <span class="bp">self</span><span class="o">.</span><span class="n">idl</span><span class="p">[</span><span class="n">r_name</span><span class="p">],</span> <span class="bp">self</span><span class="o">.</span><span class="n">shape</span><span class="p">[</span><span class="n">r_name</span><span class="p">])</span> <span class="o">+</span> <span class="bp">self</span><span class="o">.</span><span class="n">r_values</span><span class="p">[</span><span class="n">r_name</span><span class="p">])</span>
+                    <span class="n">tmp</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">_expand_deltas</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">deltas</span><span class="p">[</span><span class="n">r_name</span><span class="p">],</span> <span class="nb">list</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">idl</span><span class="p">[</span><span class="n">r_name</span><span class="p">]),</span> <span class="bp">self</span><span class="o">.</span><span class="n">shape</span><span class="p">[</span><span class="n">r_name</span><span class="p">])</span> <span class="o">+</span> <span class="bp">self</span><span class="o">.</span><span class="n">r_values</span><span class="p">[</span><span class="n">r_name</span><span class="p">])</span>
                 <span class="k">else</span><span class="p">:</span>
                     <span class="n">tmp</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">deltas</span><span class="p">[</span><span class="n">r_name</span><span class="p">]</span> <span class="o">+</span> <span class="bp">self</span><span class="o">.</span><span class="n">r_values</span><span class="p">[</span><span class="n">r_name</span><span class="p">])</span>
                 <span class="n">r_length</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="nb">len</span><span class="p">(</span><span class="n">tmp</span><span class="p">[</span><span class="o">-</span><span class="mi">1</span><span class="p">]))</span>