update docs

Author: dellis1972

Documentation/guides/building-apps/build-items.md

@@ -215,10 +215,20 @@ excluded from the final package. The default values are as follows
 	<AndroidPackagingOptionsExclude Include="$([MSBuild]::Escape('*.kotlin_*')" />
 </ItemGroup>
 ```
+
 Items can use file blob characters for wildcards such as `*` and `?`.
 However these Items MUST use URL encoding or '$([MSBuild]::Escape(''))'.
 This is so MSBuild does not try to interpret them as actual file wildcards.
 
+For example 
+
+```
+<ItemGroup>
+	<AndroidPackagingOptionsExclude Include="%2A.foo_%2A" />
+  <AndroidPackagingOptionsExclude Include="$([MSBuild]::Escape('*.foo')" />
+</ItemGroup>
+```
+
 NOTE: `*`, `?` and `.` will be replaced in the `BuildApk` task with the
 appropriate file globs.
 
@@ -243,9 +253,18 @@ included from the final package. The default values are as follows
 	<AndroidPackagingOptionsInclude Include="$([MSBuild]::Escape('*.kotlin_builtins')" />
 </ItemGroup>
 ```
+
 Items can use file blob characters for wildcards such as `*` and `?`.
 However these Items MUST use URL encoding or '$([MSBuild]::Escape(''))'.
 This is so MSBuild does not try to interpret them as actual file wildcards.
+For example 
+
+```
+<ItemGroup>
+	<AndroidPackagingOptionsInclude Include="%2A.foo_%2A" />
+  <AndroidPackagingOptionsInclude Include="$([MSBuild]::Escape('*.foo')" />
+</ItemGroup>
+```
 
 NOTE: `*`, `?` and `.` will be replaced in the `BuildApk` task with the
 appropriate file globs.