Copy BYacc's nice way to report the grammar.

* src/gram.h, src/gram.c (grammar_rhs_print, grammar_rules_print):
New.
Don't print the rules' location, it is confusing and useless.
(rule_print): Use grammar_rhs_print.
* src/print.c (print_grammar): Use grammar_rules_print.

tests/conflicts.at

@@ -130,6 +130,8 @@ AT_CLEANUP
 
 AT_SETUP([Unresolved SR Conflicts])
 
+AT_KEYWORDS([report])
+
 AT_DATA([input.y],
 [[%token NUM OP
 %%
@@ -147,10 +149,10 @@ AT_CHECK([cat input.output], [],
 
 Grammar
 
-  Number, Line, Rule
-    0   3 $axiom -> exp $
-    1   3 exp -> exp OP exp
-    2   3 exp -> NUM
+    0 $axiom: exp $
+
+    1 exp: exp OP exp
+    2    | NUM
 
 
 Terminals, with rules where they appear
@@ -241,6 +243,8 @@ AT_CLEANUP
 
 AT_SETUP([Solved SR Conflicts])
 
+AT_KEYWORDS([report])
+
 AT_DATA([input.y],
 [[%token NUM OP
 %right OP
@@ -254,10 +258,10 @@ AT_CHECK([bison input.y -o input.c --report=all], 0, [], [])
 AT_CHECK([cat input.output], [],
 [[Grammar
 
-  Number, Line, Rule
-    0   4 $axiom -> exp $
-    1   4 exp -> exp OP exp
-    2   4 exp -> NUM
+    0 $axiom: exp $
+
+    1 exp: exp OP exp
+    2    | NUM
 
 
 Terminals, with rules where they appear

tests/reduce.at

@@ -89,7 +89,16 @@ exp: useful;
 ]])
 
 AT_CHECK([[bison input.y]], 0, [],
-[[input.y contains 9 useless nonterminals
+[[input.y: warning: 9 useless nonterminals
+input.y:4.8-15: warning: useless nonterminal: useless1
+input.y:5.8-15: warning: useless nonterminal: useless2
+input.y:6.8-15: warning: useless nonterminal: useless3
+input.y:7.8-15: warning: useless nonterminal: useless4
+input.y:8.8-15: warning: useless nonterminal: useless5
+input.y:9.8-15: warning: useless nonterminal: useless6
+input.y:10.8-15: warning: useless nonterminal: useless7
+input.y:11.8-15: warning: useless nonterminal: useless8
+input.y:12.8-15: warning: useless nonterminal: useless9
 ]])
 
 AT_CHECK([[sed -n '/^Grammar/q;/^$/!p' input.output]], 0,
@@ -133,7 +142,25 @@ useless9: '9';
 ]])
 
 AT_CHECK([[bison input.y]], 0, [],
-[[input.y contains 9 useless nonterminals and 9 useless rules
+[[input.y: warning: 9 useless nonterminals and 9 useless rules
+input.y:6.1-8: warning: useless nonterminal: useless1
+input.y:7.1-8: warning: useless nonterminal: useless2
+input.y:8.1-8: warning: useless nonterminal: useless3
+input.y:9.1-8: warning: useless nonterminal: useless4
+input.y:10.1-8: warning: useless nonterminal: useless5
+input.y:11.1-8: warning: useless nonterminal: useless6
+input.y:12.1-8: warning: useless nonterminal: useless7
+input.y:13.1-8: warning: useless nonterminal: useless8
+input.y:14.1-8: warning: useless nonterminal: useless9
+input.y:6.9-13: warning: useless rule: useless1: '1'
+input.y:7.9-13: warning: useless rule: useless2: '2'
+input.y:8.9-13: warning: useless rule: useless3: '3'
+input.y:9.9-13: warning: useless rule: useless4: '4'
+input.y:10.9-13: warning: useless rule: useless5: '5'
+input.y:11.9-13: warning: useless rule: useless6: '6'
+input.y:12.9-13: warning: useless rule: useless7: '7'
+input.y:13.9-13: warning: useless rule: useless8: '8'
+input.y:14.9-13: warning: useless rule: useless9: '9'
 ]])
 
 AT_CHECK([[sed -n '/^Grammar/q;/^$/!p' input.output]], 0,
@@ -208,7 +235,12 @@ non_productive: non_productive useless_token
 ]])
 
 AT_CHECK([[bison not-reduced.y]], 0, [],
-[[not-reduced.y contains 2 useless nonterminals and 3 useless rules
+[[not-reduced.y: warning: 2 useless nonterminals and 3 useless rules
+not-reduced.y:14.1-13: warning: useless nonterminal: not_reachable
+not-reduced.y:11.6-19: warning: useless nonterminal: non_productive
+not-reduced.y:11.4-57: warning: useless rule: exp: non_productive
+not-reduced.y:14.14-56: warning: useless rule: not_reachable: useful
+not-reduced.y:17.15-18.63: warning: useless rule: non_productive: non_productive useless_token
 ]])
 
 AT_CHECK([[sed -n '/^Grammar/q;/^$/!p' not-reduced.output]], 0,
@@ -275,7 +307,12 @@ indirection: underivable;
 ]])
 
 AT_CHECK([[bison input.y]], 0, [],
-[[input.y contains 2 useless nonterminals and 3 useless rules
+[[input.y: warning: 2 useless nonterminals and 3 useless rules
+input.y:5.15-25: warning: useless nonterminal: underivable
+input.y:6.14-24: warning: useless nonterminal: indirection
+input.y:5.13-25: warning: useless rule: exp: underivable
+input.y:6.12-24: warning: useless rule: underivable: indirection
+input.y:7.12-24: warning: useless rule: indirection: underivable
 ]])
 
 AT_CHECK([[sed -n '/^Grammar/q;/^$/!p' input.output]], 0,

tests/regression.at

@@ -112,6 +112,8 @@ AT_CLEANUP
 
 AT_SETUP([Rule Line Numbers])
 
+AT_KEYWORDS([report])
+
 AT_DATA([input.y],
 [[%%
 expr:
@@ -148,12 +150,15 @@ AT_CHECK([bison input.y -o input.c -v])
 AT_CHECK([cat input.output], [],
 [[Grammar
 
-  Number, Line, Rule
-    0   5 $axiom -> expr $
-    1   5 @1 -> /* empty */
-    2   2 expr -> 'a' @1 'b'
-    3  18 @2 -> /* empty */
-    4  15 expr -> @2 'c'
+    0 $axiom: expr $
+
+    1 @1: /* empty */
+
+    2 expr: 'a' @1 'b'
+
+    3 @2: /* empty */
+
+    4 expr: @2 'c'
 
 
 Terminals, with rules where they appear
@@ -349,6 +354,8 @@ AT_CLEANUP
 
 AT_SETUP([Web2c Report])
 
+AT_KEYWORDS([report])
+
 AT_DATA([input.y],
 [[%token	undef_id_tok const_id_tok
 
@@ -375,13 +382,12 @@ AT_CHECK([bison -v input.y])
 
 AT_CHECK([sed -n 's/  *$//;/^$/!p' input.output], 0,
 [[Grammar
-  Number, Line, Rule
-    0   6 $axiom -> CONST_DEC_PART $
-    1   6 CONST_DEC_PART -> CONST_DEC_LIST
-    2  10 CONST_DEC_LIST -> CONST_DEC
-    3  12 CONST_DEC_LIST -> CONST_DEC_LIST CONST_DEC
-    4  16 @1 -> /* empty */
-    5  15 CONST_DEC -> @1 undef_id_tok '=' const_id_tok ';'
+    0 $axiom: CONST_DEC_PART $
+    1 CONST_DEC_PART: CONST_DEC_LIST
+    2 CONST_DEC_LIST: CONST_DEC
+    3               | CONST_DEC_LIST CONST_DEC
+    4 @1: /* empty */
+    5 CONST_DEC: @1 undef_id_tok '=' const_id_tok ';'
 Terminals, with rules where they appear
 $ (0) 0
 ';' (59) 5
@@ -470,6 +476,8 @@ AT_CLEANUP
 
 AT_SETUP([Web2c Actions])
 
+AT_KEYWORDS([report])
+
 AT_DATA([input.y],
 [[%%
 statement:  struct_stat;