Handle long task names in --list output

invoke/program.py

@@ -954,12 +954,13 @@ def print_columns(
         # Calculate column sizes: don't wrap flag specs, give what's left over
         # to the descriptions.
         name_width = max(len(x[0]) for x in tuples)
-        desc_width = (
+        desc_width = max(
+            1,
             pty_size()[0]
             - name_width
             - self.leading_indent_width
             - self.col_padding
-            - 1
+            - 1,
         )
         wrapper = textwrap.TextWrapper(width=desc_width)
         for name, help_str in tuples:

tests/program.py

@@ -810,6 +810,21 @@ def docstrings_are_wrapped_to_terminal_width(self):
                 ),
             )
 
+        def long_task_names_may_exhaust_terminal_width(self):
+            name = (
+                "my-very-long-task-name-that-is-completely-legit-but-make-"
+                "grep-crash-aaaaaa"
+            )
+
+            def body(c):
+                pass  # pragma: no cover
+
+            program = Program(namespace=Collection(Task(body, name=name)))
+            with patch("invoke.program.pty_size", return_value=(80, 24)):
+                stdout, _ = run("--list", program=program)
+
+            assert "  {}\n".format(name) in stdout
+
         def empty_collections_say_no_tasks(self):
             expect(
                 "-c empty -l", err="No tasks found in collection 'empty'!\n"