patch 8.0.1155: Ruby command triggers a warning

Problem:    Ruby command triggers a warning when RUBYOPT is set to "-w".
Solution:   use "-e_=0" instead of "-e0". (Masataka Pocke Kuwabara, closes
            #2143)

Author: brammool

src/if_ruby.c

@@ -882,7 +882,7 @@ static int ensure_ruby_initialized(void)
 #ifdef RUBY19_OR_LATER
 	    {
 		int dummy_argc = 2;
-		char *dummy_argv[] = {"vim-ruby", "-e0"};
+		char *dummy_argv[] = {"vim-ruby", "-e_=0"};
 		ruby_options(dummy_argc, dummy_argv);
 	    }
 	    ruby_script("vim-ruby");

src/version.c

@@ -761,6 +761,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1155,
 /**/
     1154,
 /**/