[TEST,DOC] Exclude vendor dir from doxygen

Author: Enrico Seiler

test/documentation/seqan3_doxygen_cfg.in

@@ -161,7 +161,8 @@ RECURSIVE              = YES
 EXCLUDE                =
 EXCLUDE_SYMLINKS       = NO
 EXCLUDE_PATTERNS       = */doc/*.cpp \
-                         */contrib/std/* \
+                         */include/seqan3/contrib/std/* \
+                         */include/seqan3/vendor/* \
                          ${SEQAN3_DOXYGEN_EXCLUDE_PATTERNS}
 EXCLUDE_SYMBOLS        = seqan3::contrib \
                          ${SEQAN3_DOXYGEN_EXCLUDE_SYMBOLS}