Fixes xcode macros format

lib/babelish/xcode_macros.rb

@@ -15,11 +15,13 @@ def self.write_macros(file_path, table, keys)
 
     def process(table, keys)
       keys.each do |key|
-        macro_name = "LS_#{key.upcase}" 
+        clean_key = key.gsub(' ', '')
+        clean_key.gsub!(/[[:punct:]]/, '_')       
+        clean_key.gsub!('__', '_')
+        clean_key = clean_key[1..clean_key.size-1] if clean_key[0] == '_'
+        clean_key = clean_key[0..clean_key.size-2] if clean_key.size > 1 and clean_key[clean_key.size-1] == '_'
+        macro_name = "LS_#{clean_key.upcase}" 
         macro_name += "_#{table.upcase}" if table != "Localizable" 
-        macro_name.gsub!(' ', '')
-        macro_name.gsub!('.', '_')
-        macro_name.gsub!('-', '_')
         @content << String.new(<<-EOS)
 #define #{macro_name} NSLocalizedStringFromTable(@"#{key}",@"#{table}",@"")
         EOS

test/babelish/test_xcode_macros.rb

@@ -57,4 +57,31 @@ def test_write_macros_process
     #clean up
     system("rm -f ./Babelish.h")
   end
+
+  def test_write_macros_process_with_special_characters
+    keys = ["%d blabla", "login!", "HEY!!"]
+    table = "Localizable"
+    macros = Babelish::XcodeMacros.new
+    macros.process(table, keys)
+    macros.write_content("Babelish.h")
+    expected_output = String.new(<<-EOS)
+//
+//  Babelish.h
+//  
+//  This file was generated by Babelish
+//  
+//  https://github.com/netbe/babelish
+//
+#define LS_DBLABLA NSLocalizedStringFromTable(@"%d blabla",@"Localizable",@"")
+#define LS_LOGIN NSLocalizedStringFromTable(@"login!",@"Localizable",@"")
+#define LS_HEY NSLocalizedStringFromTable(@"HEY!!",@"Localizable",@"")
+    EOS
+    assert File.exists?("Babelish.h")
+    result = File.read("Babelish.h")
+    assert_equal expected_output, result
+    #clean up
+    system("rm -f ./Babelish.h")
+  end
+
+
 end