Fix a rendering issue in the geo envelope docs.
Previously the formatting information didn't display in the docs, and the
sentence just rendered as "bounding rectangle in the format :".
@@ -617,7 +617,7 @@ POST /example/doc
Elasticsearch supports an `envelope` type, which consists of coordinates
for upper left and lower right points of the shape to represent a
-bounding rectangle in the format [[minLon, maxLat],[maxLon, minLat]]:
+bounding rectangle in the format `[[minLon, maxLat], [maxLon, minLat]]`:
[source,js]
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