Fix the order of Rust and Ruby

And a bit improvement

src/code-gen.rb

@@ -77,13 +77,6 @@ def f(s,n)s.gsub(/.{1,#{n*255}}/m){yield$S=E[$s=$&]}end;
 END
 # rp: Re-Pair (Naive byte pair encoding)
 
-class Rust < CodeGen
-  File = "QR.rs"
-  Cmd = "rustc QR.rs && ./QR > OUTFILE"
-  Apt = "rustc"
-  Code = %q(%(fn main(){println!("{}",#{E[PREV]});}))
-end
-
 class Python_R_Ratfor_REXX < CodeGen
   File = ["QR.py", "QR.R", "QR.ratfor", "QR.rexx"]
   Cmd = [
@@ -920,7 +913,7 @@ def code
           )
             for(n=9;substr(s,j,1)!=sprintf("%c",++n););
           s="\\"4,:,";
-          split("#{ "BLC".unpack(?m)[0].bytes * g }",a);
+          split("#{"BLC".unpack(?m)[0].bytes*g}",a);
           for(i in a){
             s=s 0;
             for(c=a[i]+0;c;c--)s=s"1+";
@@ -1158,6 +1151,13 @@ def code
   end
 end
 
+class Rust < CodeGen
+  File = "QR.rs"
+  Cmd = "rustc QR.rs && ./QR > OUTFILE"
+  Apt = "rustc"
+  Code = %q(%(fn main(){print!("{}",#{E[PREV]});}))
+end
+
 class Ruby < CodeGen
   File = "QR.rb"
   Cmd = "ruby QR.rb > OUTFILE"