patch 8.2.3914: various spelling mistakes in comments

Problem:    Various spelling mistakes in comments.
Solution:   Fix the mistakes. (Dominique Pellé, closes #9416)
diff --git a/src/findfile.c b/src/findfile.c
index ab59776..d3de9fc 100644
--- a/src/findfile.c
+++ b/src/findfile.c
@@ -749,7 +749,7 @@
 	// downward search loop
 	for (;;)
 	{
-	    // check if user user wants to stop the search
+	    // check if user wants to stop the search
 	    ui_breakcheck();
 	    if (got_int)
 		break;
@@ -1376,7 +1376,7 @@
     int			url = FALSE;
 #endif
 
-    // For an URL we only compare the name, otherwise we compare the
+    // For a URL we only compare the name, otherwise we compare the
     // device/inode (unix) or the full path name (not Unix).
     if (path_with_url(fname))
     {