fix process_list() function

to handle IndexError exception as well as lines starting with '*' that
were not list items.

src/gmirator/generate.py

@@ -134,15 +134,18 @@ def process_file(ifile: TextIOWrapper):
     return contents, title
 
 def process_list(line: str, in_list: bool):
-    if in_list:
-        if line[0] == "*":
-            line = re.sub(r'^\* (.*)', r'<li>\1</li>', line)
-        else:
-            in_list = False
-            line = "</ul>\n\n"
-    elif line[0] == "*":
-        line = "<ul>\n" + re.sub(r'^\* (.*)', r'<li>\1</li>', line)
-        in_list = True
+    try:
+        if in_list:
+            if line[:2] == "* ":
+                line = re.sub(r'^\* (.*)', r'<li>\1</li>', line)
+            else:
+                in_list = False
+                line = f"</ul>\n\n{line}"
+        elif line[:2] == "* ":
+            line = "<ul>\n" + re.sub(r'^\* (.*)', r'<li>\1</li>', line)
+            in_list = True
+    except IndexError:
+        in_list = False
     return line, in_list
 
 def process_inline(line: str):