ShellPkg: Refine the code style and comment.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Qiu Shumin <shumin.qiu@intel.com>
Reviewed-by: : Jaben Carsey <Jaben.carsey@intel.com>


git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@16061 6f19259b-4bc3-4df7-8a09-765794883524

ShellPkg/Application/Shell/ShellManParser.c

@@ -605,6 +605,7 @@ ProcessManFile(
   HelpSize    = 0;
   BriefSize   = 0;
   TempString  = NULL;
+  Ascii       = FALSE;
   //
   // See if it's in HII first
   //

ShellPkg/Application/Shell/ShellParametersProtocol.c

@@ -30,7 +30,7 @@
   @param[in, out] Walker        pointer to string of command line.  Adjusted to
                                 reminaing command line on return
   @param[in, out] TempParameter pointer to string of command line item extracted.
-
+  @param[in]      Length        buffer size of TempParameter.
 **/
 VOID
 EFIAPI