/usr/share/doc/libsoup2.4-dbg/README is in libsoup2.4-dbg 2.38.1-1.
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It is a symlink to /usr/share/doc/libsoup2.4-dbg/../libsoup2.4-1/README
/usr/share/doc/libsoup2.4-dbg/../libsoup2.4-1/README