Unified spelling and remove space

Signed-off-by: Valdnet <47037905+Valdnet@users.noreply.github.com>

app/src/main/res/values/strings.xml

@@ -180,7 +180,7 @@ How to translate with transifex:
     <string name="nc_diagnose_dialog_open_diagnose">Open diagnosis screen</string>
 
     <string name="nc_ignore_battery_optimization_dialog_title">Ignore battery optimization</string>
-    <string name="nc_ignore_battery_optimization_dialog_text">Battery optimization is not ignored. This should be changed to make sure that notifications work in the background! Please click OK and select \"All apps\" -> %1$s -> Don\'t optimize</string>
+    <string name="nc_ignore_battery_optimization_dialog_text">Battery optimization is not ignored. This should be changed to make sure that notifications work in the background! Please click OK and select \"All apps\" -> %1$s -> Do not optimize</string>
 
     <string name="nc_diagnose_meta_category_title">Meta information</string>
     <string name="nc_diagnose_meta_system_report_date">Generation of system report</string>
@@ -779,7 +779,7 @@ How to translate with transifex:
     <string name="nc_conversation_not_found">Conversation not found</string>
     <string name="add_to_notes">Add to Notes</string>
     <string name="nc_edited_by_admin">Edited by admin</string>
-    <string name="nc_edited_by">"Edited by "</string>
+    <string name="nc_edited_by">"Edited by"</string>
     <string name="nc_clear_edit_button">Clear Edit Button</string>
     <string name="nc_edit_icon">Edit Icon</string>
     <string name="get_invitations_error">Failed to fetch pending invitations</string>