Fix comment regex so we don't screw up structured comments with
different internal indentation levels.
diff --git a/Doc/tools/sgmlconv/latex2esis.py b/Doc/tools/sgmlconv/latex2esis.py
index afa2d86..cf50050 100755
--- a/Doc/tools/sgmlconv/latex2esis.py
+++ b/Doc/tools/sgmlconv/latex2esis.py
@@ -24,7 +24,7 @@
_begin_env_rx = re.compile(r"[\\]begin{([^}]*)}")
_end_env_rx = re.compile(r"[\\]end{([^}]*)}")
_begin_macro_rx = re.compile("[\\\\]([a-zA-Z]+[*]?)({|\\s*\n?)")
-_comment_rx = re.compile("%+[ \t]*(.*)\n")
+_comment_rx = re.compile("%+ ?(.*)\n")
_text_rx = re.compile(r"[^]%\\{}]+")
_optional_rx = re.compile(r"\s*[[]([^]]*)[]]")
_parameter_rx = re.compile("[ \n]*{([^}]*)}")