x11-wm/subtle: unbreak the port's build against new Ruby versions

File.exists? method has been deprecated and removed in Ruby 3.2.0,
adjust the code accordingly.

PR:	269177

x11-wm/subtle/Makefile

@@ -21,6 +21,8 @@ ALL_TARGET=	build
 
 post-patch:
 	@${REINPLACE_CMD} -e 1d ${WRKSRC}/data/subtler/runner.rb
+	@${REINPLACE_CMD} -e 's,File\.exists\?,File.exist?,' \
+		${WRKSRC}/data/sur/server.rb
 	@${REINPLACE_CMD} -e 's,/etc/xdg,${LOCALBASE}&,' \
 		${WRKSRC}/src/subtle/ruby.c
 

x11-wm/subtle/files/patch-Rakefile

@@ -42,6 +42,15 @@
      end
  
      checksums
+@@ -282,7 +282,7 @@ task(:config) do
+     end
+ 
+     # Get revision
+-    if File.exists?(".hg") and (hg = find_executable0("hg"))
++    if File.exist?(".hg") and (hg = find_executable0("hg"))
+       match = `#{hg} tip`.match(/^[^:]+:\s*(\d+).*/)
+ 
+       if !match.nil? and 2 == match.size
 @@ -396,7 +396,10 @@ task(:config) do
        checking_for("X11/Xft/Xft.h") do
          ret = false