https://github.com/magicalraccoon/tootstream/issues/231

Index: src/tootstream/toot.py
--- src/tootstream/toot.py.orig
+++ src/tootstream/toot.py
@@ -905,7 +905,7 @@ def help(mastodon, rest):
                 cprint("{section}:".format(section=section),
                        fg('white') +
                        attr('bold') +
-                       attr('underlined'))
+                       attr('underline'))
                 new_section = False
 
             print("{:>12} {:<15}  {:<}".format(command, cmd_args, cmd_doc))
@@ -958,11 +958,11 @@ def toot(mastodon, rest):
             cprint("You tooted: ", fg('white') + attr('bold'), end="\n")
             if resp['sensitive']:
                 cprint('CW: ' + resp['spoiler_text'], fg('red'))
-            cprint(text, fg('magenta') + attr('bold') + attr('underlined'))
+            cprint(text, fg('magenta') + attr('bold') + attr('underline'))
             posted = True
         except Exception as e:
             cprint("Received error: ", fg('red') + attr('bold'), end="")
-            cprint(e, fg('magenta') + attr('bold') + attr('underlined'))
+            cprint(e, fg('magenta') + attr('bold') + attr('underline'))
 
         # If we're streaming then we can't edit the toot, so assume that we posted.
         if is_streaming is True:
@@ -1104,7 +1104,7 @@ def boost(mastodon, rest):
         cprint(msg, fg('green'))
     except Exception as e:
         cprint("Received error: ", fg('red') + attr('bold'), end="")
-        cprint(e, fg('magenta') + attr('bold') + attr('underlined'))
+        cprint(e, fg('magenta') + attr('bold') + attr('underline'))
 
 
 boost.__argstr__ = '<id>'