Correct "an SQL" usage

Corrected grammatical error from "a SQL" to "an SQL" in documentation

Author: spannm

docs/20-getting-started.html

@@ -331,7 +331,7 @@ <h2>Identifiers escaping</h2>
 
 <p>
             You should escaping identifiers including a blank space using square brackets or backtick character (`). <br />
-            Also you shold escaping identifiers that equal a SQL keyword (e.g. <code>SELECT * FROM [SELECT] or SELECT * FROM `SELECT`</code>).
+            Also you shold escaping identifiers that equal an SQL keyword (e.g. <code>SELECT * FROM [SELECT] or SELECT * FROM `SELECT`</code>).
         </p>
 
 <p>

docs/30-jdbc-client-tools.html

@@ -82,7 +82,7 @@ <h2>Using the UCanAccess command-line console</h2>
             or commands at this prompt. All queries and commands end with a semicolon (&quot;;&quot;).
         </p>
 
-<p>A SQL query looks like this:
+<p>An SQL query looks like this:
             <code>UCanAccess&gt;SELECT * FROM License;</code>
         </p>
 

src/site/xhtml/20-getting-started.xhtml

@@ -234,7 +234,7 @@ public class CryptCodecOpener implements JackcessOpenerInterface {
         <h2>Identifiers escaping</h2>
         <p>
             You should escaping identifiers including a blank space using square brackets or backtick character (`). <br/>
-            Also you shold escaping identifiers that equal a SQL keyword (e.g. <code>SELECT * FROM [SELECT] or SELECT * FROM `SELECT`</code>).
+            Also you shold escaping identifiers that equal an SQL keyword (e.g. <code>SELECT * FROM [SELECT] or SELECT * FROM `SELECT`</code>).
         </p>
         <p>
             SQL Keywords are: ALL, AND,ANY, AS, AT, AVG, BETWEEN, BOTH, BY, CALL, CASE, CAST, COALESCE,

src/site/xhtml/30-jdbc-client-tools.xhtml

@@ -14,7 +14,7 @@
             the Access DB file. Once it reads in the database file, it will print out a prompt. You can enter SQL queries
             or commands at this prompt. All queries and commands end with a semicolon (";").
         </p>
-        <p>A SQL query looks like this:
+        <p>An SQL query looks like this:
             <code>UCanAccess&gt;SELECT * FROM License;</code>
         </p>
         <p>