gn: Stop printing all help when the command is unknown

gn: Stop printing all help when the command is unknown

When a command is unrecognized (usually due to a typo), gn previously
printed all the top level help, which scrolled the error off the screen.
Now it just prints the list of known commands.

BUG=

Committed: https://crrev.com/f2347fca65aa949fb935c500142a5110f99e453c
Cr-Commit-Position: refs/heads/master@{#390999}

[watk, 2016-04-30 02:35:15]

Description was changed from

==========
gn: Stop printing all help when the command is unknown

When a command is unrecognized (usually due to a typo), gn previously
printed all the top level help, which scrolls the error off the screen.
Now it just prints the list of known commands.

BUG=
==========

to

==========
gn: Stop printing all help when the command is unknown

When a command is unrecognized (usually due to a typo), gn previously
printed all the top level help, which scrolled the error off the screen.
Now it just prints the list of known commands.

BUG=
==========

[watk, 2016-04-30 02:35:15]

watk@chromium.org changed reviewers:
+ brettw@chromium.org

[watk, 2016-04-30 02:37:27]

Hi Brett, I found this to be a minor UX problem. It seems like printing just the
commands is almost always enough, but let me know what you think.

[brettw, 2016-05-02 16:38:45]

lgtm

[watk, 2016-05-02 17:42:13]

The CQ bit was checked by watk@chromium.org

[commit-bot: I haz the power, 2016-05-02 17:42:27]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1939603002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1939603002/1

[commit-bot: I haz the power, 2016-05-02 18:29:29]

Description was changed from

==========
gn: Stop printing all help when the command is unknown

When a command is unrecognized (usually due to a typo), gn previously
printed all the top level help, which scrolled the error off the screen.
Now it just prints the list of known commands.

BUG=
==========

to

==========
gn: Stop printing all help when the command is unknown

When a command is unrecognized (usually due to a typo), gn previously
printed all the top level help, which scrolled the error off the screen.
Now it just prints the list of known commands.

BUG=
==========

[commit-bot: I haz the power, 2016-05-02 18:29:30]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-05-02 18:30:54]

Description was changed from

==========
gn: Stop printing all help when the command is unknown

When a command is unrecognized (usually due to a typo), gn previously
printed all the top level help, which scrolled the error off the screen.
Now it just prints the list of known commands.

BUG=
==========

to

==========
gn: Stop printing all help when the command is unknown

When a command is unrecognized (usually due to a typo), gn previously
printed all the top level help, which scrolled the error off the screen.
Now it just prints the list of known commands.

BUG=

Committed: https://crrev.com/f2347fca65aa949fb935c500142a5110f99e453c
Cr-Commit-Position: refs/heads/master@{#390999}
==========

[commit-bot: I haz the power, 2016-05-02 18:30:55]

Patchset 1 (id:??) landed as
https://crrev.com/f2347fca65aa949fb935c500142a5110f99e453c
Cr-Commit-Position: refs/heads/master@{#390999}