update REP 149 to enable quoted literals (ros-infrastructure#288)

Author: dirk-thomas

rep-0149.rst

@@ -5,7 +5,7 @@ Status: Final
 Type: Standards Track
 Content-Type: text/x-rst
 Created: 11-Oct-2017
-Post-History: 02-Jan-2018
+Post-History: 02-Jan-2018, 31-Aug-2020
 
 Outline
 =======
@@ -608,6 +608,8 @@ Attributes
   * variable names which start with a `$` sign and are followed by
     alphanumerics and underscores
   * literals which can only contain alphanumerics, underscores and dashes
+  * quoted literals (single or double quotes) which can contain any characters
+    except the used quote character
   * arbitrary whitespaces between these tokens
 
  An expression syntactically correct by the previous definition will be

xsd/package_format3.xsd

@@ -32,7 +32,7 @@
         <xs:attribute name="condition" use="optional">
           <xs:simpleType>
             <xs:restriction base="xs:token">
-              <xs:pattern value="[$A-Za-z0-9_\s&lt;&gt;!=()-]*"/>
+              <xs:pattern value="[$A-Za-z0-9_\s&quot;'&lt;&gt;!=()-]*"/>
             </xs:restriction>
           </xs:simpleType>
         </xs:attribute>