minor mods.

doc/LLgen/LLgen.n

@@ -1,6 +1,14 @@
 .\"	$Header$
 .\"	Run this paper off with
 .\"	refer [options] -p LLgen.refs LLgen.doc | [n]eqn | tbl | (nt)roff -ms
+.if '\*(>.'' \{\
+.	if '\*(.>'' \{\
+.		if n .ds >. .
+.		if n .ds >, ,
+.		if t .ds .> .
+.		if t .ds ,> ,\
+\}\
+\}
 .cs 5 22u
 .RP
 .ND
@@ -147,7 +155,7 @@ We can describe the syntax of an ECF syntax with an ECF syntax :
 .ft 5
 grammar         : rule +
                 ;
-.ft P
+.ft R
 .DE
 This grammar rule states that a grammar consists of one or more
 rules.
@@ -155,7 +163,7 @@ rules.
 .ft 5
 rule            : nonterminal ':' productionrule ';'
                 ;
-.ft P
+.ft R
 .DE
 A rule consists of a left hand side, the nonterminal,
 followed by ":",
@@ -165,7 +173,7 @@ the \fBproduce symbol\fR, followed by a production rule, followed by a
 .ft 5
 productionrule  : production [ '|' production ]*
                 ;
-.ft P
+.ft R
 .DE
 A production rule consists of one or
 more alternative productions separated by "|". This symbol is called the
@@ -174,7 +182,7 @@ more alternative productions separated by "|". This symbol is called the
 .ft 5
 production      : term *
                 ;
-.ft P
+.ft R
 .DE
 A production consists of a possibly empty list of terms.
 So, empty productions are allowed.
@@ -182,7 +190,7 @@ So, empty productions are allowed.
 .ft 5
 term            : element repeats
                 ;
-.ft P
+.ft R
 .DE
 A term is an element, possibly with a repeat specification.
 .DS
@@ -191,7 +199,7 @@ element         : LITERAL
                 | IDENTIFIER
                 | '[' productionrule ']'
                 ;
-.ft P
+.ft R
 .DE
 An element can be a LITERAL, which basically is a single character
 between apostrophes, it can be an IDENTIFIER, which is either a
@@ -203,7 +211,7 @@ repeats         : '?'
                 | [ '*' | '+' ] NUMBER ?
                 | NUMBER ?
                 ;
-.ft P
+.ft R
 .DE
 These are the repeat specifications discussed above. Notice that
 this specification may be empty.
@@ -283,7 +291,7 @@ by writing
 .ft 5
 .sp 1
 %token  name1, name2, . . . ;
-.ft P
+.ft R
 .fi
 .PP
 \fILLparse\fR is designed to recognize special nonterminal
@@ -297,7 +305,7 @@ legal, f.i.:
 .ft 5
 .sp 1
 %start LLparse, specification ;
-.ft P
+.ft R
 .fi
 .sp 1
 declares "specification" as a start symbol and associates the
@@ -354,7 +362,7 @@ expr(int *pval;) { int fact; } :
                  */
         ;
 .sp 1
-.ft P
+.ft R
 .fi
 is a rule to recognize a number of factors, separated by "+", and
 to compute their sum.
@@ -391,7 +399,7 @@ Error Recovery
 The error recovery technique used by \fILLgen\fR is a
 modification of the one presented in .
 .[
-Rohrich
+automatic construction error correcting
 .]
 It is based on \fBdefault choices\fR, which just are
 what the word says, default choices at
@@ -461,14 +469,14 @@ in which the term appears, and
 .nf
                 term+
 .fi
-.ft P
+.ft R
 .sp 1
 is treated as
 .sp 1
 .nf
 .ft 5
                 term term* .
-.ft P
+.ft R
 .fi
 .PP
 It is also clear, that it can never be the default choice to do
@@ -485,7 +493,7 @@ For instance, the rule
 .nf
 commandlist : command* ;
 .fi
-.ft P
+.ft R
 .sp 1
 could be changed to
 .sp 1
@@ -493,7 +501,7 @@ could be changed to
 .nf
 commandlist : [ %persistent command ]* ;
 .fi
-.ft P
+.ft R
 .sp 1
 The effects of this in case of a syntax error are twofold:
 The set @T@ mentioned above will be extended as if "command" were
@@ -587,7 +595,7 @@ nonterminal, f.i.:
 .nf
 .ft 5
 %first fmac, nonterm ;
-.ft P
+.ft R
 .sp 1
 .fi
 declares "fmac" as a macro with one parameter, whose value
@@ -654,7 +662,7 @@ only once in the grammar specification, f.i.:
 .nf
 .ft 5
 %lexical scanner ;
-.ft P
+.ft R
 .fi
 .sp 1
 declares "scanner" as the name of the lexical analyzer.
@@ -793,7 +801,7 @@ repeats : /* empty */
         ;
 
 .fi
-.ft P
+.ft R
 .bp
 .SH
 Appendix B : An example
@@ -956,7 +964,7 @@ main() {
         return parse();
 }   }
 .fi
-.ft P
+.ft R
 .bp
 .SH
 Appendix C. How to use \fILLgen\fR.
@@ -1014,4 +1022,4 @@ decl.o:         Lpars.h
 expr.o:         Lpars.h
 
 .fi
-.ft P
+.ft R