add one placeholder

Author: v-thepet

docs/msbuild/xdcmake-task.md

@@ -38,7 +38,7 @@ Wraps the XML Documentation tool (*xdcmake.exe*), which merges XML document comm
 |**AdditionalDocumentFile**|Optional **String[]** parameter.<br /><br /> Specifies one or more additional *.xdc* files to merge.<br /><br /> For more information, see the **Additional Document Files** description in [XML Document Generator Tool property pages](/cpp/ide/xml-document-generator-tool-property-pages). Also see the **/old** and **/Fs** command-line options for *xdcmake.exe*.|  
 |**AdditionalOptions**|Optional **String** parameter.<br /><br /> A list of options as specified on the command line. For example, /\<option1> /\<option2> /\<option#>. Use this parameter to specify options that are not represented by any other **XDCMake** task parameter.<br /><br /> For more information, see [XDCMake reference](/cpp/ide/xdcmake-reference), [XML Document Generator Tool property pages](/cpp/ide/xml-document-generator-tool-property-pages), and command-line help (**/?**) for *xdcmake.exe*.|  
 |**DocumentLibraryDependencies**|Optional **Boolean** parameter.<br /><br /> If `true` and the current project has a dependency on a static library (*.lib*) project in the solution, the *.xdc* files for that library project are included in the *.xml* file output for the current project.<br /><br /> For more information, see the **Document Library Dependencies** description in [XML Document Generator Tool property pages](/cpp/ide/xml-document-generator-tool-property-pages).|  
-|**OutputFile**|Optional **String** parameter.<br /><br /> Overrides the default output file name. The default name is derived from the name of the first *.xdc* file that is processed.<br /><br /> For more information, see the **/out:**`filename` option in [XDCMake reference](/cpp/ide/xdcmake-reference). Also see the **/old** and **/Fo** command-line options for *xdcmake.exe*.|  
+|**OutputFile**|Optional **String** parameter.<br /><br /> Overrides the default output file name. The default name is derived from the name of the first *.xdc* file that is processed.<br /><br /> For more information, see the **/out:\<filename>** option in [XDCMake reference](/cpp/ide/xdcmake-reference). Also see the **/old** and **/Fo** command-line options for *xdcmake.exe*.|  
 |**ProjectName**|Optional **String** parameter.<br /><br /> The name of the current project.|  
 |**SlashOld**|Optional **Boolean** parameter.<br /><br /> If `true`, enables additional *xdcmake.exe* options.<br /><br /> For more information, see the **/old** command-line option for *xdcmake.exe*.|  
 |**Sources**|Required `ITaskItem[]` parameter.<br /><br /> Defines an array of MSBuild source file items that can be consumed and emitted by tasks.|