patch 8.2.4928: various white space and cosmetic mistakes

Problem:    Various white space and cosmetic mistakes.
Solution:   Change spaces to tabs, improve comments.
diff --git a/src/gui.c b/src/gui.c
index 2544c53..3b0ebac 100644
--- a/src/gui.c
+++ b/src/gui.c
@@ -5371,7 +5371,7 @@
     // escape slash and backslash
     p = vim_strsave_escaped(find_text, (char_u *)"/\\");
     if (p != NULL)
-        ga_concat(&ga, p);
+	ga_concat(&ga, p);
     vim_free(p);
     if (flags & FRD_WHOLE_WORD)
 	ga_concat(&ga, (char_u *)"\\>");
@@ -5445,7 +5445,7 @@
 	    // direction
 	    p = vim_strsave_escaped(ga.ga_data, (char_u *)"?");
 	    if (p != NULL)
-	        (void)do_search(NULL, '?', '?', p, 1L, searchflags, NULL);
+		(void)do_search(NULL, '?', '?', p, 1L, searchflags, NULL);
 	    vim_free(p);
 	}