Cleanup, typos, documentation, oh my!

Author: barnson

src/wix/WixToolset.Core.WindowsInstaller/MspBackend.cs

@@ -58,7 +58,7 @@ public IBindResult Bind(IBindContext context)
                 subStorages = command.Execute();
             }
 
-            // Create WindowsInstallerData with patch metdata and transforms as sub-storages
+            // Create WindowsInstallerData with patch metadata and transforms as sub-storages
             // and create MSP from that WindowsInstallerData.
             IBindResult result = null;
             try

src/xsd/wix.xsd

@@ -1378,7 +1378,10 @@
     </xs:attribute>
     <xs:attribute name="CacheId" type="xs:string">
       <xs:annotation>
-        <xs:documentation>The identifier to use when caching the package.</xs:documentation>
+        <xs:documentation>
+          The identifier to use when caching the package. WiX provides default cache ids---do not override the default unless you
+          have a specific need and understand the implications.
+        </xs:documentation>
       </xs:annotation>
     </xs:attribute>
     <xs:attribute name="DisplayName" type="xs:string">