gn format: fix some cases of too many blank lines between items

gn format: fix some cases of too many blank lines between items

R=brettw@chromium.org
BUG=348474
Committed: https://crrev.com/785ffa786a39e0b98ff3ebf1dfeec3c47340fd15
Cr-Commit-Position: refs/heads/master@{#298341}

[scottmg, 2014-10-06 22:36:55]

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

[brettw, 2014-10-06 22:41:01]

LGTM, I think it makes sense that some things always have a blank line bewteen
them (toplevel targets) and some never do (imports), but I still kind of think
the rest should be up to the author.

[scottmg, 2014-10-06 22:43:14]

On 2014/10/06 22:41:01, brettw wrote:
> LGTM, I think it makes sense that some things always have a blank line bewteen
> them (toplevel targets) and some never do (imports), but I still kind of think
> the rest should be up to the author.

OK. I'm looking at the diffs between what's checked in, and what happens atm. If
it seems like there's no obvious rule-based version that can work then I'll look
at saving blank lines in the parse tree instead.

[scottmg, 2014-10-06 22:43:32]

The CQ bit was checked by scottmg@chromium.org

[commit-bot: I haz the power, 2014-10-06 22:53:14]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/636663002/20001

[commit-bot: I haz the power, 2014-10-07 02:52:31]

Committed patchset #2 (id:20001) as 5a29bde628f5cd6c7f9a40360c5079926995900c

[commit-bot: I haz the power, 2014-10-07 02:53:34]

Patchset 2 (id:??) landed as
https://crrev.com/785ffa786a39e0b98ff3ebf1dfeec3c47340fd15
Cr-Commit-Position: refs/heads/master@{#298341}