Update README.md

wording2

README.md

@@ -243,25 +243,12 @@ spans, virtual copies, persistent structures, and the Green storage model.
 Those are layers to build on top of this primitive, not requirements for using
 this one.
 
-For a ZigZag cell catalogue, the natural simple pattern is:
-
-    cell ID (tumbler)
-          |
-          v
-       enfilade
-          |
-          v
-       cell pointer
-
-New cells can therefore be catalogued under newly allocated tumbler IDs without
-making the catalogue itself understand the cell's internal representation.
-
 FILES
 -----
 
 inc/              public C and S7 headers
 src/              C implementation, bundled S7, and REPL sources
-test/             C regression tests and S7 smoke test
+test/             C regression tests and S7 test
 scheme/           Scheme reference implementation and S7 support scripts
 doc/              usage guide and groff manual pages
 configure          compiler and shared-library capability checks
@@ -274,7 +261,7 @@ Run all regression checks with:
 
     make check
 
-This builds and runs the pure C tests and the bundled S7 smoke test.
+This builds and runs the pure C tests and the bundled S7 test.
 
 HISTORICAL REFERENCES
 ---------------------