Minor tweak to the pubspec.lock output to remove the leading whitespace from the file.

Minor tweak to the pubspec.lock output to remove the leading whitespace from the file.

"        # Generated by pub. See: http://pub.dartlang.org/doc/glossary.html#lockfile"
"         {"packages":{}}"
        
becomes:

# Generated by pub.
# see http://pub.dartlang.org/doc/glossary.html#lockfile

{"packages":{}}
Committed: https://code.google.com/p/dart/source/detail?r=20655

[devoncarew, 2013-03-28 18:08:09]

This tweak kills 8 spaces that prefix each line in pubspec.lock.

[nweiz, 2013-03-28 18:09:44]

lgtm

[devoncarew, 2013-03-28 23:10:40]

Committed patchset #1 manually as r20655 (presubmit successful).