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When `pmgen.py` reads a `foobar.pmg` file, it writes `foobar_pm.h` containing
-a class `foobar_pm`. That class is instanciated with an RTLIL module and a
+a class `foobar_pm`. That class is instantiated with an RTLIL module and a
list of cells from that module:
foobar_pm pm(module, module->selected_cells());
initialized. A `match` block will only consider cells for which all `select`
expressions evaluated to `true`. Note that the state variable corresponding to
the match (in the example `mul`) is the only state variable that may be used
-`select` lines.
+in `select` lines.
Index lines are using the `index <type> expr1 === expr2` syntax. `expr1` is
evaluated during matcher initialization and the same restrictions apply as for