remove @ marks around app_version

mail/app/macbuild/Contents/Info.plist.in

@@ -1,4 +1,4 @@
-<?xml version="1.0" encoding="UTF-8"?>
+<?xml version="1.0" encoding="UTF-8"?>
 <!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
 <plist version="1.0">
 <dict>
@@ -19,11 +19,11 @@
 	<key>CFBundlePackageType</key>
 	<string>APPL</string>
 	<key>CFBundleShortVersionString</key>
-	<string>@APP_VERSION@</string>
+	<string>APP_VERSION</string>
 	<key>CFBundleSignature</key>
 	<string>MOZM</string>
 	<key>CFBundleVersion</key>
-	<string>@APP_VERSION@</string>
+	<string>APP_VERSION</string>
 	<key>NSAppleScriptEnabled</key>
 	<true/>
 </dict>