[evince] Fix tabs in guidelines for contributors

[Germán Poo-Caamaño <gpoo src gnome org>]

commit c4070fa802fa847337a6154cebf71ae2afc4225e
Author: Germán Poo-Caamaño <gpoo gnome org>
Date:   Sun Jun 21 17:53:48 2020 -0400

    Fix tabs in guidelines for contributors

 CONTRIBUTING.md | 1 -
 1 file changed, 1 deletion(-)
---
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 64a942db..e806bcc5 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -120,7 +120,6 @@ gboolean  do_something_four  (GtkWidget  *widget);
    opening brace is its own line, for other statements, right after
    the statement.
  * Spaces before braces and parenthesis.
- * No tabs, spaces only.
  * Always compare against `NULL` rather than implicit comparisons.
    This eases ports to other languages and readability.
  * Use #define for constants. Try to avoid “magic constants” or