Fix py-markdown plugin (#1008)

* fix wrong console method and unescape the tag content before running markdown on it

* [pre-commit.ci] auto fixes from pre-commit.com hooks

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* add markdown plugin example test

* add PyMarkdown minimal test

* remove commented code

* [pre-commit.ci] auto fixes from pre-commit.com hooks

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* remove import of console from pyscript

* remove unused imports

* [pre-commit.ci] auto fixes from pre-commit.com hooks

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Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Co-authored-by: Fabio Pliger <fpliger@anaconda.com>

pyscriptjs/src/plugins/python/py_markdown.py

@@ -1,9 +1,11 @@
+import html
 from textwrap import dedent
 
+from js import console
 from markdown import markdown
-from pyscript import Plugin, console
+from pyscript import Plugin
 
-console.warning(
+console.warn(
     "WARNING: This plugin is still in a very experimental phase and will likely change"
     " and potentially break in the future releases. Use it with caution."
 )
@@ -26,6 +28,7 @@ class PyMarkdown:
         self.element = element
 
     def connect(self):
-        self.element.innerHTML = markdown(
-            dedent(self.element.source), extensions=["fenced_code"]
-        )
+        unescaped_content = html.unescape(self.element.originalInnerHTML)
+        original = dedent(unescaped_content)
+        inner = markdown(original, extensions=["fenced_code"])
+        self.element.innerHTML = inner