/usr/share/doc/postgresql-9.5-pgrouting-doc/html/en/src/common/doc/utilities/ is in postgresql-9.5-pgrouting-doc 2.1.0-1.
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/usr/share/doc/postgresql-9.5-pgrouting-doc/html/en/src/common/doc/utilities/end_point.html
/usr/share/doc/postgresql-9.5-pgrouting-doc/html/en/src/common/doc/utilities/get_column_name.html
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/usr/share/doc/postgresql-9.5-pgrouting-doc/html/en/src/common/doc/utilities/version.html
/usr/share/doc/postgresql-9.5-pgrouting-doc/html/en/src/common/doc/utilities/versionless.html