Fix some typos in gn's documentation for "copy".

Fix some typos in gn's documentation for "copy".

Committed: https://crrev.com/c5166a2201bcf4b8738dcbae33709de0831cabc8
Cr-Commit-Position: refs/heads/master@{#349218}

[eroman, 2015-09-15 17:38:37]

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

[eroman, 2015-09-15 17:57:26]

https://codereview.chromium.org/1346653004/diff/20001/tools/gn/docs/reference.md
File tools/gn/docs/reference.md (right):

https://codereview.chromium.org/1346653004/diff/20001/tools/gn/docs/reference...
tools/gn/docs/reference.md:3783: ### **Ordering of flags and values**:
Not sure why this change was added.

I generated the file using
  gn help --markdown all > tools/gn/docs/reference.md

So I presume it is correct.

[brettw, 2015-09-16 20:24:21]

lgtm

[eroman, 2015-09-16 20:30:18]

The CQ bit was checked by eroman@chromium.org

[commit-bot: I haz the power, 2015-09-16 20:32:00]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1346653004/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1346653004/20001

[commit-bot: I haz the power, 2015-09-16 20:48:47]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2015-09-16 20:49:17]

Patchset 2 (id:??) landed as
https://crrev.com/c5166a2201bcf4b8738dcbae33709de0831cabc8
Cr-Commit-Position: refs/heads/master@{#349218}