xpath insert unexpected newlines

Hello guys,

It seems that xpath function add unexpected newlines in the xml elements it returns as array:

postgres=> select version();
version
------------------------------------------------------------
PostgreSQL 10.3, compiled by Visual C++ build 1800, 64-bit
(1 row)

postgres=> select ((xpath('/*',xml('<root><a/><b/><c/></root>')))[1])::text;
xpath
---------
<root> +
<a/> +
<b/> +
<c/> +
</root>
(1 row)

A workaround is to have at least one element with a value:

postgres=> select ((xpath('/*',xml('<root><a/><b/><c/>one value</root>')))[1])::text;
xpath
------------------------------------
<root><a/><b/><c/>one value</root>
(1 row)

Best regards.

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