jdec output doesn't preserve the name of the module at the start of the
declaration.

Example:
-------------------------------
$ cat module-info.jcod
module foo.bar {
  0xCAFEBABE;
  0; // minor version
  53; // version
  [] { // Constant Pool
    ; // first element is empty
    class #8; // #1
    Utf8 "SourceFile"; // #2
    Utf8 "module-info.java"; // #3
    Utf8 "Module"; // #4
    Module #9; // #5
    Module #10; // #6
    Utf8 "9-ea"; // #7
    Utf8 "module-info"; // #8
    Utf8 "foo.bar"; // #9
    Utf8 "java.base"; // #10
  } // Constant Pool

  0x8000; // access
  #1;// this_cpx
  #0;// super_cpx

  [] { // Interfaces
  } // Interfaces

  [] { // fields
  } // fields

  [] { // methods
  } // methods

  [] { // Attributes
    Attr(#2) { // SourceFile
      #3;
    } // end SourceFile
    ;
    Attr(#4) { // Module
      #5; // name_index
      0x0000; // flags
      #0; // version
      [] { // requires
        #6 0x8000 #7;
      } // requires

      [] { // exports
      } // exports

      [] { // opens
      } // opens

      [] { // uses
      } // uses

      [] { // provides
      } // provides

    } // end Module
  } // Attributes
} // end module foo.bar
$ java -jar asmtools.jar jcoder -d out module-info.jcod
$ java -jar asmtools.jar jdec out/module-info.class > module-info.jcod.after
$ diff module-info.jcod module-info.jcod.after
1c1
< module foo.bar {
---
> module {
-------------------------------

Note that the module name in the end comment ("end module XXX") is
preserved.

The name given at the start of the module doesn't seem to have any effect on the .class output, but it would be nice to preserve it for readability reasons.