pandoc output a <p> in <script> when using -markdown_in_html_blocks

[henix]

Tested on both cabal install version and the latest git version (3b79246)

$ pandoc --version
pandoc 1.12.2.1
Compiled with texmath 0.6.5.2, highlighting-kate 0.5.5.

Here is test.md, trying to write a raw <script> in markdown:

<script type="text/javascript">
var a = 1;
</script>

Render it by: pandoc -f markdown-markdown_in_html_blocks test.md, the output is:

<script type="text/javascript">

<p>var a = 1; </script></p>

which is bad. My expected output should be the same as what pandoc -f markdown test.md output:

<script type="text/javascript">
var a = 1;
</script>

i.e. should not touch anything in the <script> tag