fix: don't strip whitespace from code blocks

Fixes #206.

otterwiki/renderer.py

@@ -60,15 +60,15 @@ def wrap(self, source):
 
 def pygments_render(code, lang, linenumbers=False):
     try:
-        lexer = get_lexer_by_name(lang, stripall=True)
+        lexer = get_lexer_by_name(lang.strip(), stripall=False)
     except ClassNotFound:
         return (
             '\n'
             + _pre_copy_to_clipboard_tag()
             + '%s\n%s</pre></div>\n'
             % (
-                mistune.escape(lang.strip()),
-                mistune.escape(code.strip()),
+                mistune.escape(lang),
+                mistune.escape(code),
             )
         )
     linenos = "table" if linenumbers else None
@@ -223,7 +223,7 @@ def block_code(self, code, info=None):
             html = (
                 '\n'
                 + _pre_copy_to_clipboard_tag()
-                + '{}</pre></div>\n'.format(mistune.escape(code.strip()))
+                + '{}</pre></div>\n'.format(mistune.escape(code))
             )
             return html
         if cursormagicword in info:

tests/test_renderer.py

@@ -561,3 +561,53 @@ def test_render_python_doublebracket():
     assert code
     code = code.text
     assert """df[['a', "b"]]""" in code
+
+
+def test_indent_preformatted_issue206():
+    md = """# Preformatted
+
+     Hello :) This is at 5 spaces.
+     5 spaces here as well."""
+    html, _ = render.markdown(md)
+    pre = BeautifulSoup(html, "html.parser").find('pre')
+    assert pre
+    assert (
+        """ Hello :) This is at 5 spaces.
+ 5 spaces here as well.\n"""
+        == pre.text
+    )
+    # backtick block
+    md = """# Code block
+
+```
+ One leading space here
+  and two here.
+```
+"""
+    html, _ = render.markdown(md)
+    pre = BeautifulSoup(html, "html.parser").find('pre')
+    assert pre
+    assert (
+        """ One leading space here
+  and two here.\n"""
+        == pre.text
+    )
+
+    # backtick block with language
+    md = """# Code block
+
+```c
+ int main(int argc, char **argv) {
+  }
+```
+"""
+    html, _ = render.markdown(md)
+    code = BeautifulSoup(html, "html.parser").find(
+        'div', {'class': 'highlight'}
+    )
+    assert code
+    assert (
+        """ int main(int argc, char **argv) {
+  }\n"""
+        == code.text
+    )