[Bug web/64468] New: Incorrect indentation in Doxygen-generated sources of libstdc++

["maltsevm at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64468

            Bug ID: 64468
           Summary: Incorrect indentation in Doxygen-generated sources of
                    libstdc++
           Product: gcc
           Version: 5.0
               URL: https://gcc.gnu.org/onlinedocs/libstdc++/latest-doxyge
                    n/a00971_source.html
            Status: UNCONFIRMED
          Severity: trivial
          Priority: P3
         Component: web
          Assignee: unassigned at gcc dot gnu.org
          Reporter: maltsevm at gmail dot com

See the attached URL. The indentation is broken (it is best visible near line
150 and further). The URL is given as an example, the problem affects other
sources and versions (at least, 4.9.2 and 4.6.4 are affected; previous versions
don't include libstd++ docs).

Probably the reason is incorrect configuration of Doxygen: libstdc++ sources
use tab size equal to 8 spaces, and in libstdc++-v3/doc/doxygen/user.cfg.in
this value is set to be equal to 4:
TAB_SIZE = 4

Some parts of the library are indented using only spaces, without tabs.