exe/githelp in githelp-0.1.0 vs exe/githelp in githelp-0.1.1

@@ -13,9 +13,14 @@
 require "bundler/setup"
 require "githelp"
 
 include Githelp
 
+unless git_check
+  STDERR.puts "Use 'githelp' in a Git repository."
+  exit
+end
+
 progpath = $0
 if File.symlink?(progpath)
   progpath = File.readlink(progpath)
 end
 progdir = "#{File.dirname(progpath)}"