[doc] Correct links to AQL documentation

Make a single click on the links work to open the external page. 

Change-Id: I7a262c6b5617c3a2f561eea0331a45e8abe36b31
Signed-off-by: Maxime Porhel <maxime.porhel@obeo.fr>
diff --git a/plugins/org.eclipse.sirius.doc/doc/specifier/general/Writing_Queries.html b/plugins/org.eclipse.sirius.doc/doc/specifier/general/Writing_Queries.html
index 500bcb1..888d49f 100644
--- a/plugins/org.eclipse.sirius.doc/doc/specifier/general/Writing_Queries.html
+++ b/plugins/org.eclipse.sirius.doc/doc/specifier/general/Writing_Queries.html
@@ -192,9 +192,7 @@
 			</li>
 			<li>AQL provides different services/methods by default compared to Acceleo. In general the set of default services in AQL is better suited to the typically use cases encountered in Sirius.</li>
 		</ul>
-		<p>See 
-			<a href="https://www.eclipse.org/acceleo/documentation/aql.html">the AQL documentation</a> for more details about the language itself, the full list of standard services, and the differences with Acceleo/MTL.
-		</p>
+		<p>See <a href="https://www.eclipse.org/acceleo/documentation/aql.html" target="_blank">the AQL documentation</a> for more details about the language itself, the full list of standard services, and the differences with Acceleo/MTL.</p>
 		<p>
 			<em>Note:</em> Viewpoint Specification Projects created with the default wizard will be already setup to use it. Otherwise you need to add a dependency to the 
 			<code>org.eclipse.sirius.common.acceleo.aql</code> plug-in to ensure AQL support will be available wherever your modelers are used. When 
@@ -206,9 +204,7 @@
 			<em>Note:</em> Several services like olcIsKindOf() or filter() use type literals and will require to explicitly reference the known meta-models as dependencies to work. It is recommended to add the corresponding meta-models plug-ins to the dependencies of the Viewpoint Specific Project.
 		</p>
 		<h2 id="acceleo">Using Acceleo</h2>
-		<p>Acceleo 3 implements the MTL standard, and provides a query language similar to OCL (with some extensions). It provides relatively good static validation and auto-completion when editing your expressions, but AQL is even better, and faster. For new modelers, prefer AQL over Acceleo/MTL. If you have existing modelers which use Acceleo/MTL, converting them to use AQL is relatively straightforward, see 
-			<a href="https://www.eclipse.org/acceleo/documentation/aql.html#MigratingfromMTLqueries">the AQL documentation</a> for details.
-		</p>
+		<p>Acceleo 3 implements the MTL standard, and provides a query language similar to OCL (with some extensions). It provides relatively good static validation and auto-completion when editing your expressions, but AQL is even better, and faster. For new modelers, prefer AQL over Acceleo/MTL. If you have existing modelers which use Acceleo/MTL, converting them to use AQL is relatively straightforward, see <a href="https://www.eclipse.org/acceleo/documentation/aql.html#MigratingfromMTLqueries" target="_blank">the AQL documentation</a> for details.</p>
 		<p>Acceleo expressions are enclosed in brackets: <code>[theExpression/]</code>. Inside the brackets you can write any valid Acceleo expression, including using 
 			<code>if</code> and 
 			<code>let</code> statements, for example. See <a href="https://wiki.eclipse.org/Acceleo" target="_blank">the Acceleo documentation</a> for the exact syntax and semantics of the language.
diff --git a/plugins/org.eclipse.sirius.doc/doc/specifier/general/Writing_Queries.textile b/plugins/org.eclipse.sirius.doc/doc/specifier/general/Writing_Queries.textile
index f323679..8c6d01e 100644
--- a/plugins/org.eclipse.sirius.doc/doc/specifier/general/Writing_Queries.textile
+++ b/plugins/org.eclipse.sirius.doc/doc/specifier/general/Writing_Queries.textile
@@ -64,7 +64,7 @@
 * AQL is more persmissive in terms of missing/empty intermediate results in complex expressions: @aql:self.anEmptyReference.somethingElse@ will not result in an error as the equivalent Acceleo (or OCL) expression would, but simply return an empty result.
 * AQL provides different services/methods by default compared to Acceleo. In general the set of default services in AQL is better suited to the typically use cases encountered in Sirius.
 
-See "the AQL documentation":https://www.eclipse.org/acceleo/documentation/aql.html for more details about the language itself, the full list of standard services, and the differences with Acceleo/MTL.
+See <a href="https://www.eclipse.org/acceleo/documentation/aql.html" target="_blank">the AQL documentation</a> for more details about the language itself, the full list of standard services, and the differences with Acceleo/MTL.
 
 _Note:_ Viewpoint Specification Projects created with the default wizard will be already setup to use it. Otherwise you need to add a dependency to the @org.eclipse.sirius.common.acceleo.aql@ plug-in to ensure AQL support will be available wherever your modelers are used. When *developing* new VSMs which use AQL, it is recommended to have the  @org.eclipse.sirius.common.acceleo.aql.ide@ plug-in installed as it provides specification-time features like expression completion. However, @org.eclipse.sirius.common.acceleo.aql.ide@ is not needed at runtime for the resulting modelers to function.
 
@@ -72,7 +72,7 @@
 
 h2(#acceleo). Using Acceleo
 
-Acceleo 3 implements the MTL standard, and provides a query language similar to OCL (with some extensions). It provides relatively good static validation and auto-completion when editing your expressions, but AQL is even better, and faster. For new modelers, prefer AQL over Acceleo/MTL. If you have existing modelers which use Acceleo/MTL, converting them to use AQL is relatively straightforward, see "the AQL documentation":https://www.eclipse.org/acceleo/documentation/aql.html#MigratingfromMTLqueries for details.
+Acceleo 3 implements the MTL standard, and provides a query language similar to OCL (with some extensions). It provides relatively good static validation and auto-completion when editing your expressions, but AQL is even better, and faster. For new modelers, prefer AQL over Acceleo/MTL. If you have existing modelers which use Acceleo/MTL, converting them to use AQL is relatively straightforward, see <a href="https://www.eclipse.org/acceleo/documentation/aql.html#MigratingfromMTLqueries" target="_blank">the AQL documentation</a> for details.
 
 Acceleo expressions are enclosed in brackets: <code>[theExpression/]</code>. Inside the brackets you can write any valid Acceleo expression, including using @if@ and @let@ statements, for example. See <a href="https://wiki.eclipse.org/Acceleo" target="_blank">the Acceleo documentation</a> for the exact syntax and semantics of the language.