@auto-rst doesn't save text

rev. 6174

Create this outline (two nodes, child node with text)

@auto-rst some.rst
    Top level title

    Text here

expectation: some.rst contains

    Top level title
    ============

    Text here

result:

Traceback (most recent call last):

  File "/mnt/usr1/usr1/home/tbrown/Package/leo/bzr/leo.repo/trunk/leo/core/leoFileCommands.py", line 2034, in writeAllAtFileNodesHelper
    c.atFileCommands.writeAll()

  File "/mnt/usr1/usr1/home/tbrown/Package/leo/bzr/leo.repo/trunk/leo/core/leoAtFile.py", line 3240, in writeAll
    self.writeAllHelper(p,force,toString,writeAtFileNodesFlag,writtenFiles)

  File "/mnt/usr1/usr1/home/tbrown/Package/leo/bzr/leo.repo/trunk/leo/core/leoAtFile.py", line 3316, in writeAllHelper
    at.writeOneAtAutoNode(p,toString=toString,force=force)

  File "/mnt/usr1/usr1/home/tbrown/Package/leo/bzr/leo.repo/trunk/leo/core/leoAtFile.py", line 3423, in writeOneAtAutoNode
    at.replaceTargetFileIfDifferent(root,ignoreBlankLines=isAtAutoRst)

  File "/mnt/usr1/usr1/home/tbrown/Package/leo/bzr/leo.repo/trunk/leo/core/leoAtFile.py", line 5305, in replaceTargetFileIfDifferent
    ok = self.create(at.targetFileName,s)

  File "/mnt/usr1/usr1/home/tbrown/Package/leo/bzr/leo.repo/trunk/leo/core/leoAtFile.py", line 5425, in create
    assert g.isUnicode(s),(type(s),repr(s))

AssertionError: (<type 'str'>, "'Top level title\\n===============\\n\\nText here\\n\\n'")