Fix copyright char changed in error in commit 80bf294

The copyright character on line 850 was changed, either by VS Code
or SourceTree, to some erroneous character in commit 80bf294. This
unexpected change was reverted here.

Author: delphidabbler

Src/UREMLDataIO.pas

@@ -1,4 +1,4 @@
-{
+{
  * This Source Code Form is subject to the terms of the Mozilla Public License,
  * v. 2.0. If a copy of the MPL was not distributed with this file, You can
  * obtain one at https://mozilla.org/MPL/2.0/
@@ -847,7 +847,7 @@ class function TREMLEntities.CharToMnemonicEntity(const Ch: Char): string;
   fEntityMap[1] := TREMLEntity.Create('quot', DOUBLEQUOTE);
   fEntityMap[2] := TREMLEntity.Create('gt',   '>');
   fEntityMap[3] := TREMLEntity.Create('lt',   '<');
-  fEntityMap[4] := TREMLEntity.Create('copy', '�');
+  fEntityMap[4] := TREMLEntity.Create('copy', '©');
 end;
 
 class destructor TREMLEntities.Destroy;