do not use RawDescriptionHelpFormatter by default

test/test_help.py

@@ -1,6 +1,7 @@
 from io import StringIO
 from contextlib import redirect_stdout, redirect_stderr
 import pytest
+from argparse import RawDescriptionHelpFormatter
 
 
 from tiramisu_cmdline_parser import TiramisuCmdlineParser
@@ -64,11 +65,31 @@ od:
 
   {str,list,int,none}  choice the sub argument
 
-two
-line
+two line
 """
     parser = TiramisuCmdlineParser(get_config(json), 'prog.py', epilog="\ntwo\nline")
     f = StringIO()
     with redirect_stdout(f):
         parser.print_help()
     assert f.getvalue() == output
+
+
+def test_help_epilog_raw(json):
+    output = """usage: prog.py [-h] {str,list,int,none}
+
+optional arguments:
+  -h, --help           show this help message and exit
+
+od:
+  od
+
+  {str,list,int,none}  choice the sub argument
+
+two
+line
+"""
+    parser = TiramisuCmdlineParser(get_config(json), 'prog.py', epilog="\ntwo\nline", formatter_class=RawDescriptionHelpFormatter)
+    f = StringIO()
+    with redirect_stdout(f):
+        parser.print_help()
+    assert f.getvalue() == output

tiramisu_cmdline_parser/api.py

@@ -13,7 +13,7 @@
 # You should have received a copy of the GNU Lesser General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 from typing import Union, List, Dict, Tuple, Optional, Any
-from argparse import ArgumentParser, Namespace, SUPPRESS, _HelpAction, RawDescriptionHelpFormatter 
+from argparse import ArgumentParser, Namespace, SUPPRESS, _HelpAction, HelpFormatter
 from copy import copy
 from gettext import gettext as _
 
@@ -106,7 +106,7 @@ class TiramisuNamespace(Namespace):
         self._config.option(true_key, index).value.set(value)
 
 
-class TiramisuHelpFormatter(RawDescriptionHelpFormatter):
+class TiramisuHelpFormatter:
     def _get_default_metavar_for_optional(self,
                                           action):
         ret = super()._get_default_metavar_for_optional(action)
@@ -114,7 +114,7 @@ class TiramisuHelpFormatter(RawDescriptionHelpFormatter):
             ret = ret.rsplit('.', 1)[1]
         return ret
 
-    class _Section(RawDescriptionHelpFormatter._Section):
+    class _Section(HelpFormatter._Section):
         def format_help(self):
             # Remove empty OD
             if self.formatter.remove_empty_od and \
@@ -135,6 +135,7 @@ class TiramisuHelpFormatter(RawDescriptionHelpFormatter):
                     return ''
             return super().format_help()
 
+
 class _TiramisuHelpAction(_HelpAction):
     needs = False
     def __call__(self, *args, **kwargs):
@@ -208,6 +209,7 @@ class TiramisuCmdlineParser(ArgumentParser):
                  fullpath: bool=True,
                  remove_empty_od: bool=False,
                  remove_empty_description_od: bool=False,
+                 formatter_class=HelpFormatter,
                  _forhelp: bool=False,
                  **kwargs):
         self.fullpath = fullpath
@@ -215,9 +217,11 @@ class TiramisuCmdlineParser(ArgumentParser):
         self.root = root
         self.remove_empty_od = remove_empty_od
         self.remove_empty_description_od = remove_empty_description_od
-        TiramisuHelpFormatter.remove_empty_od = self.remove_empty_od
-        TiramisuHelpFormatter.remove_empty_description_od = self.remove_empty_description_od
-        kwargs['formatter_class'] = TiramisuHelpFormatter
+        if TiramisuHelpFormatter not in formatter_class.__mro__:
+            formatter_class = type('TiramisuHelpFormatter', (TiramisuHelpFormatter, formatter_class), {})
+        formatter_class.remove_empty_od = self.remove_empty_od
+        formatter_class.remove_empty_description_od = self.remove_empty_description_od
+        kwargs['formatter_class'] = formatter_class
         if self.root is None:
             subconfig = self.config.option
         else:
@@ -272,6 +276,7 @@ class TiramisuCmdlineParser(ArgumentParser):
                                                root=self.root,
                                                remove_empty_od=self.remove_empty_od,
                                                remove_empty_description_od=self.remove_empty_description_od,
+                                               formatter_class=self.formatter_class,
                                                epilog=self.epilog,
                                                fullpath=self.fullpath)
             namespace_, args_ = new_parser._parse_known_args(args_, namespace)
@@ -510,6 +515,7 @@ class TiramisuCmdlineParser(ArgumentParser):
                                                fullpath=self.fullpath,
                                                remove_empty_od=self.remove_empty_od,
                                                remove_empty_description_od=self.remove_empty_description_od,
+                                               formatter_class=self.formatter_class,
                                                epilog=self.epilog,
                                                _forhelp=True)
         return super(TiramisuCmdlineParser, help_formatter).format_usage(*args, **kwargs)
@@ -521,6 +527,7 @@ class TiramisuCmdlineParser(ArgumentParser):
                                                fullpath=self.fullpath,
                                                remove_empty_od=self.remove_empty_od,
                                                remove_empty_description_od=self.remove_empty_description_od,
+                                               formatter_class=self.formatter_class,
                                                epilog=self.epilog,
                                                _forhelp=True)
         return super(TiramisuCmdlineParser, help_formatter).format_help()