updated for version 7.3.615

Problem:    Completion for a user command does not recognize backslash before
            a space.
Solution:   Recognize escaped characters. (Yasuhiro Matsumoto)

src/ex_docmd.c

@@ -3390,12 +3390,23 @@ set_one_cmd_context(xp, buff)
 	return NULL;
 
     /* Find start of last argument (argument just before cursor): */
-    p = buff + STRLEN(buff);
+    p = buff;
-    while (p != arg && *p != ' ' && *p != TAB)
-	p--;
-    if (*p == ' ' || *p == TAB)
-	p++;
     xp->xp_pattern = p;
+    len = STRLEN(buff);
+    while (*p && p < buff + len)
+    {
+	if (*p == ' ' || *p == TAB)
+	{
+	    /* argument starts after a space */
+	    xp->xp_pattern = ++p;
+	}
+	else
+	{
+	    if (*p == '\\' && *(p + 1) != NUL)
+		++p; /* skip over escaped character */
+	    mb_ptr_adv(p);
+	}
+    }
 
     if (ea.argt & XFILE)
     {
@@ -3821,8 +3832,22 @@ set_one_cmd_context(xp, buff)
 		    if (compl == EXPAND_MAPPINGS)
 			return set_context_in_map_cmd(xp, (char_u *)"map",
 					 arg, forceit, FALSE, FALSE, CMD_map);
-		    while ((xp->xp_pattern = vim_strchr(arg, ' ')) != NULL)
+		    /* Find start of last argument. */
-			arg = xp->xp_pattern + 1;
+		    p = arg;
+		    while (*p)
+		    {
+			if (*p == ' ')
+			{
+			    /* argument starts after a space */
+			    arg = p + 1;
+			}
+			else
+			{
+			    if (*p == '\\' && *(p + 1) != NUL)
+				++p; /* skip over escaped character */
+			    mb_ptr_adv(p);
+			}
+		    }
 		    xp->xp_pattern = arg;
 		}
 		xp->xp_context = compl;

src/version.c

@@ -714,6 +714,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    615,
 /**/
     614,
 /**/