plugins/snt/metrics: fix liquid syntax warning

_pages/plugins/snt/metrics.md

@@ -12,11 +12,10 @@ tags: snt,reconstruction,tracing,arbor,neuron,morphometry,dendrite,axon,neuroana
 
 ## Metrics
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-**This list is focused on default measurements available through SNT's GUI and does not include specialized metrics available via its scripting API. Thus, it only captures [a subset](#notes) of the full repertoire of SNT metrics.**<br>
-
+**This list is focused on default measurements available through SNT's GUI and does not include specialized metrics available via its scripting API. Thus, it only captures [a subset](#notes) of the full repertoire of SNT metrics.**
+<br><br>
 **For each metric SNT retrieves the descriptive statistics _Mix_, _Max_, _Mean_, _Standard Deviation_ (SD), _Sum_ and _N_**, which may lead to inevitable [redundancy](#notes) between measurements. E.g., when measuring  [Branch length](#branch-length) for a particular cell, it is possible to retrieve the length of the smallest branch (_Min_), the longest (_Max_), the average and standard deviation of all branch lengths (_Mean_ and _SD_), their total length (_Sum_), and number (_N_).
-<br>
-<br>
+<br><br>
 Metrics ported from published literature include their associated publication in the definition.
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