proper exploration of older history: avoid premature fallback on current "rev" (see also d3d5cb2d6866, 6706d6f0afda);
#built-in components
src/Tools/jEdit
src/Tools/GraphBrowser
src/Tools/Graphview
src/Tools/Setup
src/Tools/VSCode
src/HOL/Mutabelle
src/HOL/Library/Sum_of_Squares
src/HOL/SPARK
src/HOL/Tools
src/HOL/TPTP