Add extra code examples to the documentation

[pspp] / doc / combining.texi

diff --git a/doc/combining.texi b/doc/combining.texi
index a7bca10f5ba6a1d1bd9a382e92706274af4357d3..9b013fe99bb365c342c83a5a7d4852aa880a637e 100644 (file)
--- a/doc/combining.texi
+++ b/doc/combining.texi
@@ -1,3 +1,12 @@
+@c PSPP - a program for statistical analysis.
+@c Copyright (C) 2017 Free Software Foundation, Inc.
+@c Permission is granted to copy, distribute and/or modify this document
+@c under the terms of the GNU Free Documentation License, Version 1.3
+@c or any later version published by the Free Software Foundation;
+@c with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts.
+@c A copy of the license is included in the section entitled "GNU
+@c Free Documentation License".
+@c
 @node Combining Data Files
 @chapter Combining Data Files
 
@@ -58,10 +67,10 @@ This section describes the syntactical features in common among the
 @cmd{ADD FILES}, @cmd{MATCH FILES}, and @cmd{UPDATE} commands.  The
 following sections describe details specific to each command.
 
-Each of these commands reads two or more input files and combines them.  
+Each of these commands reads two or more input files and combines them.
 The command's output becomes the new active dataset.
 None of the commands actually change the input files.
-Therefore, if you want the changes to become permanant, you must explictly
+Therefore, if you want the changes to become permanent, you must explicitly
 save them using an appropriate procedure or transformation (@pxref{System and Portable File IO}).
 
 The syntax of each command begins with a specification of the files to
@@ -170,6 +179,9 @@ only in files that are not present for the current case are set to the
 system-missing value for numeric variables or spaces for string
 variables.
 
+These commands may combine any number of files, limited only by the
+machine's memory.
+
 @node ADD FILES
 @section ADD FILES
 @vindex ADD FILES
@@ -298,7 +310,7 @@ Once per command:
 @end display
 
 @cmd{UPDATE} updates a @dfn{master file} by applying modifications
-from one or more @dfn{transaction files}.  
+from one or more @dfn{transaction files}.
 
 @cmd{UPDATE} shares the bulk of its syntax with other @pspp{} commands for
 combining multiple data files.  @xref{Combining Files Common Syntax},