[evolution] Correct a typo in the comment

[Tomas Popela <tpopela src gnome org>]

commit 6636197166618397f0ea4ca1484dda54657ca09a
Author: Tomas Popela <tpopela redhat com>
Date:   Wed Aug 17 17:12:42 2016 +0200

    Correct a typo in the comment

 .../web-extension/e-editor-dom-functions.c         |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/modules/webkit-editor/web-extension/e-editor-dom-functions.c 
b/modules/webkit-editor/web-extension/e-editor-dom-functions.c
index e7065bf..8f02284 100644
--- a/modules/webkit-editor/web-extension/e-editor-dom-functions.c
+++ b/modules/webkit-editor/web-extension/e-editor-dom-functions.c
@@ -4507,7 +4507,7 @@ quote_plain_text_recursive (WebKitDOMDocument *document,
 
                /* Even in plain text mode we can have some basic html element
                 * like anchor and others. When Forwaring e-mail as Quoted EMFormat
-                * generates header that contatains <b> tags (bold font).
+                * generates header that contains <b> tags (bold font).
                 * We have to treat these elements separately to avoid
                 * modifications of theirs inner texts */
                is_html_node =