Improve resolution debugging

poetry/mixology/version_solver.py

@@ -277,7 +277,7 @@ class VersionSolver:
             new_incompatibility = True
             new_incompatibility = True
 
 
             partially = '' if difference is None else ' partially'
             partially = '' if difference is None else ' partially'
-            bang = '!'
+            bang = '<fg=red>!</>'
             self._log('{} {} is{} satisfied by {}'.format(
             self._log('{} {} is{} satisfied by {}'.format(
                 bang, most_recent_term, partially, most_recent_satisfier)
                 bang, most_recent_term, partially, most_recent_satisfier)
             )
             )

poetry/puzzle/provider.py

@@ -70,7 +70,7 @@ class Provider:
         self._io = io
         self._io = io
         self._python_constraint = package.python_constraint
         self._python_constraint = package.python_constraint
         self._search_for = {}
         self._search_for = {}
-        self._is_debugging = self._io.is_debug()
+        self._is_debugging = self._io.is_debug() or self._io.is_very_verbose()
 
 
     @property
     @property
     def pool(self):  # type: () -> Pool
     def pool(self):  # type: () -> Pool