Merge branch 'maint'

Merge branch 'maint'

* origin/maint:
  tests: check %no-lines
  tests: minor simplification
  graphs: stylistic changes.
  graphs: minor style changes
  graphs: show reductions
  graphs: style: prefix state number with "state"
  graphs: style: use left justification for states
  graphs: style: prefix rules and change shapes
  obstack: import obstack_finish0 from master
  c++: api.location.type
  muscles: a function for backward compatibility
  maint: more macros

Conflicts:
	data/glr.cc
	data/java.m4
	data/lalr1.cc
	doc/bison.texi
	src/muscle-tab.c
	src/system.h
	tests/calc.at