etex_gen.tex: sync from Build

git-svn-id: svn://tug.org/texlive/trunk@37057 c570f23f-e606-0410-a88d-b1316a301751

1 files changed, 31 insertions, 31 deletions

diff --git a/Master/texmf-dist/doc/etex/base/etex_gen.tex b/Master/texmf-dist/doc/etex/base/etex_gen.tex
index 795aaf36884..c9dd037c4e2 100644
--- a/Master/texmf-dist/doc/etex/base/etex_gen.tex
+++ b/Master/texmf-dist/doc/etex/base/etex_gen.tex
@@ -1,4 +1,4 @@
-% etex_gen.tex --- How to generate e-TeX --- last modified 22 Oct 1996
+% etex_gen.tex --- How to generate e-TeX --- last modified 06 Mar 1998
 
 \font\eighttt= cmtt8
 \font\eightrm= cmr8
@@ -22,7 +22,7 @@
 \vfill
 \centerline{\titlefont How to generate \eTeX}
 \vskip 6pt
-\centerline{({\sl Version 1, October 1996\/})}
+\centerline{({\sl Version 2, March 1998\/})}
 \vskip 18pt
 \centerline{by The \NTS\ Team}
 \vskip 6pt
@@ -31,7 +31,7 @@
 \centerline{Philip Taylor, RHBNC, University of London}
 \vfill
 \centerline{\vbox{\hsize 4in
-\noindent Given an implementaion of \TeX82 for a particular system, this
+\noindent Given an implementation of \TeX82 for a particular system, this
 report describes how to generate a corresponding implementation of
 \eTeX.}}
 \vskip 24pt
@@ -60,10 +60,10 @@ Deutschsprachige Anwendervereinigung \TeX\ e.V.\hfil\break
 \section Introduction.
 Let us first review the process of generating an implementation of
 \TeX82 for a particular system from the source files as, e.g., described
-in the \.{WEB} manual [1].  The system independent source file
+in the \.{WEB} manual [1].  The system-independent source file
 \.{tex.web} must remain unmodified.  All changes to \.{tex.web}
 necessary for a particular operating system and\slash or compiler are to
-be collected in a system dependent change file, typically named
+be collected in a system-dependent change file, typically named
 \.{tex.ch}.  Both files \.{tex.web} and \.{tex.ch} are effectively
 merged when input by the \.{WEB} system programs \.{WEAVE} and
 \.{TANGLE}.  When \.{WEAVE} processes this merged input, a file
@@ -91,11 +91,11 @@ the same executable program used with different run time options.
 \vskip 24pt plus 24pt
 \section Generating \eTeX.
 The process of generating \eTeX\ is essentially the same as that of
-generating \TeX\ as described above.  Conceptually there is a system
-independent source file \.{etex.web} and a system dependent change file
-\.{etex.sys}.  Processing these two files by \.{TANGLE} yields a string
-pool file \.{etex.pool} as well as a Pascal file \.{etex.pas}, whilst
-processing by \.{WEAVE} produces a \TeX\ source file, \.{etex.tex}.
+generating \TeX\ as described above.  Conceptually there is a
+system-independent source file \.{etex.web} and a system-dependent change
+file \.{etex.sys}.  Processing these two files by \.{TANGLE} yields a
+string pool file \.{etex.pool} as well as a Pascal file \.{etex.pas},
+whilst processing by \.{WEAVE} produces a \TeX\ source file, \.{etex.tex}.
 
 It may, however, be necessary to increase some of the constants defined
 in \.{TANGLE} and \.{WEAVE}.  The following values should suffice in
@@ -115,15 +115,15 @@ The source file \.{etex.web} for \eTeX\ does not, however, exist as a
 physical file.  It is the hypothetical file obtained by applying the
 changes in the actual source file \.{etex.ch} to \.{tex.web}.  Thus
 \.{etex.web} inherits the bulk of code from \.{tex.web}, whilst the
-system independent source file \.{etex.ch} for \eTeX\ defines the
+system-independent source file \.{etex.ch} for \eTeX\ defines the
 differences between \.{etex.web} and \.{tex.web}.  In order to generate
 an implementation of \eTeX\ two change files have to be applied to
 \.{tex.web}, one after the other (the actual file names may differ):
 $$
 \vcenter{\halign{#\hfil&\qquad\.{#}\hfil&\qquad#\hfil\cr
-0.&tex.web&system independent \.{WEB} source for \TeX\cr
-1.&etex.ch&system independent changes for \eTeX\cr
-2.&etex.sys&system dependent changes for \eTeX\cr
+0.&tex.web&system-independent \.{WEB} source for \TeX\cr
+1.&etex.ch&system-independent changes for \eTeX\cr
+2.&etex.sys&system-dependent changes for \eTeX\cr
 }}
 $$
 
@@ -144,7 +144,7 @@ Every implementor of \eTeX\ is responsible for creating and maintaining
 a suitable \.{etex.sys} in the same way as every implementor of \TeX\
 is responsible for creating and maintaining \.{tex.ch}.  Since the bulk
 of code in \.{etex.web} is identical to that in \.{tex.web} the bulk of
-the system dependent changes in \.{etex.sys} for a particular system
+the system-dependent changes in \.{etex.sys} for a particular system
 will be identical to those in \.{tex.ch} for the same system.  In the
 following we try to give some hints where \.{etex.sys} for a particular
 system might deviate from the corresponding \.{tex.ch}.
@@ -161,18 +161,18 @@ in addition to those occupied by strings from the pool file.  It is,
 therefore, sufficient to increase \\{pool\_size} (or reduce
 \\{string\_vacancies}) by the number of \eTeX's additional string
 characters and to increase \\{max\_strings} by the number of \eTeX's
-additional strings.  The later will, however, be unnecessary for most
+additional strings.  The latter will, however, be unnecessary for most
 implementations as \\{max\_strings} is usually increased substantially
 beyond its standard value in order to accommodate large \TeX\ macro
 packages.
 
-For Version~1 of \eTeX, there are less than 100 additional strings with
-less that 1000 additional string characters.  The precise numbers can be
+For Version~2 of \eTeX, there are about 100 additional strings with
+about 1500 additional string characters.  The precise numbers can be
 obtained by running \.{POOLTYPE} on \TeX's and \eTeX's pool files
 (\.{POOLTYPE} reports the total number of strings and string characters
 in a pool file).
 
-Next, \.{etex.sys} may contain a system dependent modification of the
+Next, \.{etex.sys} may contain a system-dependent modification of the
 \\{eTeX\_banner} string.  The modified \\{eTeX\_banner} string must
 contain `\.{e-TeX}' as well as the \eTeX\ version number.  Note,
 however, that the \\{banner} string modified by \.{tex.ch} will not be
@@ -185,24 +185,24 @@ different pool file name and\slash or format file extension (see below).
 
 Finally, \.{etex.sys} will necessarily deviate whenever \.{etex.ch}
 and \.{tex.ch} try to change the same piece of \.{WEB} code or when the
-system independent \eTeX\ changes from \.{etex.ch} and the system
-dependent \TeX\ changes from \.{tex.ch} interfere in some other way.  In
-case of any such interference implementors must first of all determine
+system-independent \eTeX\ changes from \.{etex.ch} and the
+system-dependent \TeX\ changes from \.{tex.ch} interfere in some other way. 
+In case of any such interference implementors must first of all determine
 how to combine the respective changes from \.{etex.ch} and \.{tex.ch}
 in order to obtain \eTeX's functionality for a particular system.
 Obviously, this process cannot be automated since it requires human
 insight.
 
 The \NTS\ team has tried to formulate \.{etex.ch} such that
-interferences with system dependent change files \.{tex.ch} are
+interferences with system-dependent change files \.{tex.ch} are
 unlikely.  Suggestions by implementors how any remaining such
 interferences could be avoided by a reformulation of \.{etex.ch} will
-be taken under serious consideration.  Such interferences can be further
-reduced by reformulating the system dependent change file \.{tex.ch} for
+be taken into serious consideration.  Such interferences can be further
+reduced by reformulating the system-dependent change file \.{tex.ch} for
 \TeX, e.g.\ by reducing the range of change entries from entire modules
 to the pieces of code that are actually changed.
 
-Implementors might prefer to maintain the system dependent change file
+Implementors might prefer to maintain the system-dependent change file
 \.{etex.sys} not as a physical file but as a hypothetical file defined
 through its deviation from \.{tex.ch}.  If there are no interferences of
 the kind mentioned above, then the effect of applying the changes from
@@ -211,10 +211,10 @@ achieved by applying 3 change files, one after the other, to \.{tex.web}
 (using some tool such as \.{TIE}, \.{PATCHWEB}, or \.{WEBMERGE}):
 $$
 \vcenter{\halign{#\hfil&\qquad\.{#}\hfil&\qquad#\hfil\cr
-0.&tex.web&system independent \.{WEB} source for \TeX\cr
-1.&etex.ch&system independent changes for \eTeX\cr
-2.&tex.ch&system dependent changes for \TeX\cr
-3.&tex.ech&additional system dependent changes for \eTeX\cr
+0.&tex.web&system-independent \.{WEB} source for \TeX\cr
+1.&etex.ch&system-independent changes for \eTeX\cr
+2.&tex.ch&system-dependent changes for \TeX\cr
+3.&tex.ech&additional system-dependent changes for \eTeX\cr
 }}
 $$
 The third change file \.{tex.ech} will be rather short and contains just
@@ -236,7 +236,7 @@ choice is, of course, an extended feature of \eTeX.  Once \eTeX\ has
 chosen compatibility mode it is, however, a legitimate implementation of
 \TeX\ (assuming the \TeX\ implementation itself is legitimate).  The
 only differences between \eTeX\ in compatibility mode and \TeX\ are
-those allowed by D.E.~Knuth [2] between different implementations of
+those allowed by D.~E.~Knuth [2] between different implementations of
 \TeX.
 
 An \.{e-TRIP} test suite [3] defines the criteria by which a program can