Fixed an error in doc processing for multiple languages.  We really
only want to process @m_page to the end its associated comment
multiple times, not the entire file.  Otherwise anything else in the
file is duplicated.  refs #1341.
Use raw strings for regular expressions in Python: otherwise I have to worry about how backslashes are interpreted.
Merge pull request #1345 from wiredtiger/doc-fix-dup

Fixed an error in doc processing for multiple languages.