[genius] Update help file a tiny bit

[Jiri (George) Lebl <jirka src gnome org>]

commit ee4d601c76315392d4c98fc76d018ed55816a575
Author: Jiri (George) Lebl <jiri lebl gmail com>
Date:   Thu Oct 14 19:21:08 2021 -0500

    Update help file a tiny bit

 help/C/genius.xml | 34 ++++++++++++++++++----------------
 1 file changed, 18 insertions(+), 16 deletions(-)
---
diff --git a/help/C/genius.xml b/help/C/genius.xml
index 84afcdb3..eac4ff4c 100644
--- a/help/C/genius.xml
+++ b/help/C/genius.xml
@@ -3,8 +3,8 @@
 "http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd"; [
   <!ENTITY app "<application>Genius Mathematics Tool</application>">
   <!ENTITY appname "Genius">
-  <!ENTITY appversion "1.0.26">
-  <!ENTITY date "December 2020">
+  <!ENTITY appversion "1.0.27">
+  <!ENTITY date "October 2021">
 
   <!ENTITY legal SYSTEM "legal.xml">
 
@@ -37,7 +37,7 @@
     <title>&appname; Manual</title>       
 
     <copyright>
-      <year>1997-2020</year>
+      <year>1997-2021</year>
       <holder>Ji&#345;&#237; (George) Lebl</holder>
     </copyright>
     <copyright>
@@ -66,7 +66,7 @@
                <surname>Lebl</surname> 
                <affiliation> 
                        <orgname>Oklahoma State University</orgname> 
-                       <address> <email>jirka 5z com</email> </address> 
+                       <address> <email>jiri lebl gmail com</email> </address> 
                </affiliation> 
       </author> 
       <author> 
@@ -133,7 +133,7 @@
                <date>August 2004</date> 
                <revdescription> 
                        <para role="author">Jiri (George) Lebl
-               <email>jirka 5z com</email>
+               <email>jiri lebl gmail com</email>
                        </para>
                </revdescription> 
       </revision> 
@@ -146,7 +146,7 @@
                <date>&date;</date> 
                <revdescription> 
                        <para role="author">Jiri (George) Lebl
-               <email>jirka 5z com</email>
+               <email>jiri lebl gmail com</email>
                        </para>
                </revdescription> 
       </revision> 
@@ -160,7 +160,7 @@
              application or this manual, please visit the
              <ulink url="http://www.jirka.org/genius.html"; type="http">Genius
                      Web page</ulink>
-             or email me at <email>jirka 5z com</email>.
+             or email me at <email>jiri lebl gmail com</email>.
       </para>
 <!-- Translators may also add here feedback address for translations -->
     </legalnotice> 
@@ -424,7 +424,7 @@ do <userinput>cd directory</userinput> as in the UNIX command shell.
       <para>
              If you wish to enter several more complicated commands, or perhaps write a complicated
              function using the <link linkend="genius-gel">GEL</link> language, you can create a new
-            program.
+            program; really just a file with many commands.
       </para>
       <para>
 To start writing a new program, choose
@@ -500,10 +500,11 @@ in a separate tab.  This is equivalent to the <command>load</command> command.
     <sect1 id="genius-line-plots">
       <title>Line Plots</title>
       <para>
-       To graph real valued functions of one variable open the <guilabel>Create Plot</guilabel>
+       To graph real-valued functions of one variable, open the <guilabel>Create Plot</guilabel>
        window.  You can also use the
         <link linkend="gel-function-LinePlot"><function>LinePlot</function></link> function
-       on the command line (see its documentation).
+       on the command line (see its documentation).  And by the words line plot, we mean plots in the plane,
+       as opposed to surface plots, which are in three dimensions.
       </para>
       <para>
        Once you click the <guilabel>Plot</guilabel> button, a window opens up with some notebooks in it.
@@ -1168,14 +1169,15 @@ this should be second nature. However genius can let you pretend it is a
 terminator to some degree.  If a <literal>;</literal> is found at the end of a parenthesis or a block,
 genius will append a null to it as if you would have written
 <userinput>;null</userinput>.
-This is useful in case you do not want to return a value from say a loop,
-or if you handle the return differently. Note that it will slightly slow down
-the code if it is executed too often as there is one more operator involved.
+This is useful in case you do not want to return a value from a loop,
+or if you handle the return differently.
       </para>
       <para>
-             If you are typing expressions in a program you do not have to add a semicolon.  In this case
-             genius will simply print the return value whenever it executes the expression.  However, do 
note that if you are defining a
-             function, the body of the function is a single expression.
+             If you are typing expressions in a program file you do not have to add a semicolon.  In this 
case
+             genius will simply print the return value whenever it executes the expression.  This is the same
+             as when typing on the command line.  However, do note that if you are defining a
+             function, the body of the function is a single expression.  Usually, therefore, if a function 
body is
+             long, you will need to enclose it in parentheses.
       </para>
     </sect1>