diff --git a/lib/redmine/scm/adapters/abstract_adapter.rb b/lib/redmine/scm/adapters/abstract_adapter.rb
index 5db4964e..41edf00a 100644
--- a/lib/redmine/scm/adapters/abstract_adapter.rb
+++ b/lib/redmine/scm/adapters/abstract_adapter.rb
@@ -101,9 +101,9 @@ module Redmine
         end
         
         def target(path)
-          path ||= ""
-          base = path.match(/^\//) ? root_url : url    
-          " \"" << "#{base}/#{path}".gsub(/["?<>\*]/, '') << "\""
+          path ||= ''
+          base = path.match(/^\//) ? root_url : url
+          shell_quote("#{base}/#{path}".gsub(/[?<>\*]/, ''))
         end
             
         def logger
diff --git a/lib/redmine/scm/adapters/subversion_adapter.rb b/lib/redmine/scm/adapters/subversion_adapter.rb
index 5b6bfa97..1e0320e2 100644
--- a/lib/redmine/scm/adapters/subversion_adapter.rb
+++ b/lib/redmine/scm/adapters/subversion_adapter.rb
@@ -100,7 +100,7 @@ module Redmine
           cmd = "#{SVN_BIN} log --xml -r #{identifier_from}:#{identifier_to}"
           cmd << credentials_string
           cmd << " --verbose " if  options[:with_paths]
-          cmd << target(path)
+          cmd << ' ' + target(path)
           shellout(cmd) do |io|
             begin
               doc = REXML::Document.new(io)
@@ -139,7 +139,7 @@ module Redmine
           cmd = "#{SVN_BIN} diff -r "
           cmd << "#{identifier_to}:"
           cmd << "#{identifier_from}"
-          cmd << "#{target(path)}@#{identifier_from}"
+          cmd << " #{target(path)}@#{identifier_from}"
           cmd << credentials_string
           diff = []
           shellout(cmd) do |io|