grund 0.16.1

• Count a resolved section citation in chapter rules (PR #450)
• Explain chapter display names and handles in rule diagnostics (PR #448)

Compatibility notices

• §FS-rules.5.1, §FS-rules.3.4, §FS-rules.7.8, §REQ-backwards-compatibility.2: a resolved citation to a numbered section now counts in chapter rules. GOAL-x.4 counts as a citation of GOAL-x, and GOAL-x.outcome.2 as one of the outcome chapter, in every rule family, as [citations.KIND] already counted them. A chapter rule that failed only because such a citation was ignored now passes. A finding the newly counted citation alone produces — a must not cite prohibition, or an at most N or exactly N count it pushes out of bounds — is a warning in this release, carrying the code it will carry as an error and ending ; a citation to a numbered section now counts, and this warning becomes an error in grund 0.18.0; the exit code does not move until then. Who this breaks, from 0.18.0: a repository whose prohibition or upper-bound rule a section citation silently evaded, most widely one with named_sections off. The escapes are to remove or move the citation, loosen the rule's count, or pass --ignore on the finding's code. (#449)