code: private Stmt.Skip parseSkipStatement(EnclosingScope scope) {
  		int start = index;
  		// Match the break keyword
  		match(Skip);
  		int end = index;
  		matchEndLine();
  		// Done.
  		return annotateSourceLocation(new Stmt.Skip(),start,end-1);
  	}
docs: Parse a skip statement, which is of the form:
  
  <pre>
  SkipStmt ::= "skip"
  </pre>
  
  @param scope
  The enclosing scope for this statement, which determines the
  set of visible (i.e. declared) variables and also the current
  indentation level.
  
  @see wyc.lang.Stmt.Skip
  @return