Use File.expand_path to expand tildes to users home folder

lib/overcommit/git_config.rb

@@ -16,8 +16,8 @@ def comment_character
     def hooks_path
       path = `git config --get core.hooksPath`.chomp
       return File.join(Overcommit::Utils.git_dir, 'hooks') if path.empty?
-
-      File.absolute_path(path, Dir.pwd)
+ q
+      File.absolute_path(File.expand_path(path), Dir.pwd)
     end
   end
 end

spec/overcommit/git_config_spec.rb

@@ -78,5 +78,18 @@
         expect(subject).to eq File.expand_path('my-hooks')
       end
     end
+
+    context 'when explicitly set to a path starting with a tilde' do
+      around do |example|
+        repo do
+          `git config --local core.hooksPath ~/my-hooks`
+          example.run
+        end
+      end
+
+      it 'returns the absolute path to the folder in the users home path' do
+        expect(subject).to eq File.expand_path('~/my-hooks')
+      end
+    end
   end
 end