Fix a small grammatical issue

data/geany.glade

@@ -4534,7 +4534,7 @@
                                 <property name="visible">True</property>
                                 <property name="can_focus">True</property>
                                 <property name="receives_default">False</property>
-                                <property name="tooltip_text" translatable="yes">Removes trailing spaces and tabs and the end of lines</property>
+                                <property name="tooltip_text" translatable="yes">Removes trailing spaces and tabs at the end of lines</property>
                                 <property name="use_underline">True</property>
                                 <property name="draw_indicator">True</property>
                               </object>