Bug 913665 - Fix wrong entity. r=fitzgen

browser/devtools/debugger/debugger.xul

@@ -177,7 +177,7 @@
       <menuitem id="auto-pretty-print"
                 type="checkbox"
                 label="&debuggerUI.autoPrettyPrint;"
-                accesskey="&debuggerUI.autoPrettyPrint.key;"
+                accesskey="&debuggerUI.autoPrettyPrint.accesskey;"
                 command="toggleAutoPrettyPrint"/>
       <menuitem id="pause-on-exceptions"
                 type="checkbox"

browser/locales/en-US/chrome/browser/devtools/debugger.dtd

@@ -44,7 +44,7 @@
 <!-- LOCALIZATION NOTE (debuggerUI.autoPrettyPrint): This is the label for the
   -  checkbox that toggles auto pretty print. -->
 <!ENTITY debuggerUI.autoPrettyPrint     "Auto Prettify Minified Sources">
-<!ENTITY debuggerUI.autoPrettyPrint.key "P">
+<!ENTITY debuggerUI.autoPrettyPrint.accesskey "P">
 
 <!-- LOCALIZATION NOTE (debuggerUI.sources.toggleBreakpoints): This is the tooltip for the
   -  button that toggles all breakpoints for all sources. -->