* doc/bison.texinfo: Use $' as shell prompt, not %'.

Use @kbd to denote user input.
(Language and Grammar): ANSIfy the example.
Adjust its layout for info/notinfo.
(Location Tracking Calc): Output error messages to stderr.
Output locations in a more GNUtically correct way.
Fix a couple of Englishos.
Adjust @group/@end group pairs.

doc/bison.info

@@ -31,10 +31,10 @@ instead of in the original English.
 
 Indirect:
 bison.info-1: 1313
-bison.info-2: 50690
-bison.info-3: 100580
-bison.info-4: 147602
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+bison.info-2: 50632
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 Tag Table:
 (Indirect)
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 Node: Copying11707
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-Node: Simple Error Recovery67307
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-Node: Grammar Outline87931
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-Node: Bison Declarations89245
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+Node: GNU Free Documentation License212552
+Node: Index232417
 
 End Tag Table