Documentation: update supported solvers and solver customization

docs/problems/index.html

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@@ -224,7 +217,7 @@ item $j$ is set to:</p>
 <p>where $K$, the correlation coefficient, and $u_j$, the correlation multiplier, are sampled
 from the provided probability distributions <code>K</code> and <code>u</code>.</p>
 <p>If <code>fix_w=True</code> is provided, then $w_{ij}$ are kept the same in all generated instances. This also implies that $n$ and $m$ are kept fixed. Although the prices and capacities are derived from $w_{ij}$, as long as <code>u</code> and <code>K</code> are not constants, the generated instances will still not be completely identical.</p>
-<p>If a probability distribution <code>w_jitter</code> is provided, then item weights will be set to $w_{ij} + \gamma_{ij}$ where $\gamma_{ij}$ is sampled from <code>w_jitter</code>. When combined with <code>fix_w=True</code>, this argument may be used to generate instances where the weight of each item is roughly the same, but not exactly identical, across all instances. The prices of the items and the capacities of the knapsacks will be calculated as above, but using these perturbed weights instead.</p>
+<p>If a probability distribution <code>w_jitter</code> is provided, then item weights will be set to $w_{ij} \gamma_{ij}$ where $\gamma_{ij}$ is sampled from <code>w_jitter</code>. When combined with <code>fix_w=True</code>, this argument may be used to generate instances where the weight of each item is roughly the same, but not exactly identical, across all instances. The prices of the items and the capacities of the knapsacks will be calculated as above, but using these perturbed weights instead.</p>
 <p>By default, all generated prices, weights and capacities are rounded to the nearest integer number. If <code>round=False</code> is provided, this rounding will be disabled.</p>
 <div class="admonition note">
 <p class="admonition-title">References</p>
@@ -241,17 +234,17 @@ from the provided probability distributions <code>K</code> and <code>u</code>.</
         
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@@ -263,8 +256,11 @@ from the provided probability distributions <code>K</code> and <code>u</code>.</
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