Version 1.10

Fix the problem in running the grep command in MS-Windows because of command-line
quoting issues.

plugin/grep.vim

@@ -1,7 +1,7 @@
 " File: grep.vim
 " Author: Yegappan Lakshmanan (yegappan AT yahoo DOT com)
-" Version: 1.9
-" Last Modified: September 10, 2007
+" Version: 1.10
+" Last Modified: April 20, 2013
 " 
 " Overview
 " --------
@@ -251,13 +251,13 @@
 "
 "       :let Grep_Find_Use_Xargs = 0
 " 
-" To handle file names with space characters in them, the xargs utility
-" is invoked with the '--null' argument. If the xargs utility in your system
-" doesn't accept the '--null' argument, then you can change the
-" Grep_Xargs_Options variable. For example, to use the '--print0' xargs
-" argument, you can use the following command:
+" To handle file names with space characters in them, the xargs utility is
+" invoked with the '-0' argument. If the xargs utility in your system doesn't
+" accept the '-0' argument, then you can change the Grep_Xargs_Options
+" variable. For example, to use the '--null' xargs argument, you can use the
+" following command:
 "
-" 	:let Grep_Xargs_Options = '--print0'
+" 	:let Grep_Xargs_Options = '--null'
 "
 " The Grep_Cygwin_Find variable should be set to 1, if you are using the find
 " utility from the cygwin package. This setting is used to handle the
@@ -352,7 +352,7 @@ endif
 
 " The command-line arguments to supply to the xargs utility
 if !exists('Grep_Xargs_Options')
-    let Grep_Xargs_Options = '--null'
+    let Grep_Xargs_Options = '-0'
 endif
 
 " The find utility is from the cygwin package or some other find utility.
@@ -404,7 +404,36 @@ endif
 " RunGrepCmd()
 " Run the specified grep command using the supplied pattern
 function! s:RunGrepCmd(cmd, pattern, action)
-    let cmd_output = system(a:cmd)
+    if has('win32') && !has('win32unix') && !has('win95')
+                \ && (&shell =~ 'cmd.exe')
+        " Windows does not correctly deal with commands that have more than 1
+        " set of double quotes.  It will strip them all resulting in:
+        " 'C:\Program' is not recognized as an internal or external command
+        " operable program or batch file.  To work around this, place the
+        " command inside a batch file and call the batch file.
+        " Do this only on Win2K, WinXP and above.
+        let s:grep_tempfile = fnamemodify(tempname(), ':h') . '\mygrep.cmd'
+        if v:version >= 700
+            call writefile([a:cmd], s:grep_tempfile, "b")
+        else
+            exe 'redir! > ' . s:grep_tempfile
+            silent echo a:cmd
+            redir END
+        endif
+
+	let cmd_output = system('"' . s:grep_tempfile . '"')
+    else
+        let cmd_output = system(a:cmd)
+    endif
+
+    if exists('s:grep_tempfile')
+        " Delete the temporary cmd file created on MS-Windows
+        call delete(s:grep_tempfile)
+    endif
+
+    " Do not check for the shell_error (return code from the command).
+    " Even if there are valid matches, grep returns error codes if there
+    " are problems with a few input files.
 
     if cmd_output == ""
         echohl WarningMsg | 
@@ -508,6 +537,7 @@ function! s:RunGrepRecursive(cmd_name, grep_cmd, action, ...)
         endif
         let pattern = g:Grep_Shell_Quote_Char . pattern . 
                         \ g:Grep_Shell_Quote_Char
+        echo "\r"
     endif
 
     let cwd = getcwd()
@@ -522,6 +552,7 @@ function! s:RunGrepRecursive(cmd_name, grep_cmd, action, ...)
     if startdir == ""
         return
     endif
+    echo "\r"
 
     if filepattern == ""
         let filepattern = input("Search in files matching pattern: ", 
@@ -529,6 +560,7 @@ function! s:RunGrepRecursive(cmd_name, grep_cmd, action, ...)
         if filepattern == ""
             return
         endif
+        echo "\r"
     endif
 
     let txt = filepattern . ' '
@@ -576,7 +608,7 @@ function! s:RunGrepRecursive(cmd_name, grep_cmd, action, ...)
     endif
 
     if g:Grep_Find_Use_Xargs == 1
-        let cmd = g:Grep_Find_Path . " " . startdir
+        let cmd = g:Grep_Find_Path . ' "' . startdir . '"'
         let cmd = cmd . " " . find_prune . " -prune -o"
         let cmd = cmd . " " . find_skip_files
         let cmd = cmd . " " . find_file_pattern
@@ -618,7 +650,14 @@ function! s:RunGrepSpecial(cmd_name, which, action, ...)
 
         while i <= last_bufno
             if bufexists(i) && buflisted(i)
-                let filenames = filenames . " " . bufname(i)
+                let fullpath = fnamemodify(bufname(i), ':p')
+                if filereadable(fullpath)
+                    if v:version >= 702
+                        let filenames = filenames . " " . fnameescape(fullpath)
+                    else
+                        let filenames = filenames . " " . fullpath
+                    endif
+                endif
             endif
             let i = i + 1
         endwhile
@@ -684,6 +723,7 @@ function! s:RunGrepSpecial(cmd_name, which, action, ...)
         if pattern == ""
             return
         endif
+        echo "\r"
     endif
 
     let pattern = g:Grep_Shell_Quote_Char . pattern . g:Grep_Shell_Quote_Char
@@ -761,6 +801,7 @@ function! s:RunGrep(cmd_name, grep_cmd, action, ...)
         endif
         let pattern = g:Grep_Shell_Quote_Char . pattern .
                         \ g:Grep_Shell_Quote_Char
+        echo "\r"
     endif
 
     if filenames == ""
@@ -773,6 +814,7 @@ function! s:RunGrep(cmd_name, grep_cmd, action, ...)
         if filenames == ""
             return
         endif
+        echo "\r"
     endif
 
     " Add /dev/null to the list of filenames, so that grep print the