Revert eclipse-theia#15331 to fix webviews

Fixes eclipse-theia#15416

Contributed on behalf of STMicroelectronics

Signed-off-by: Thomas Mäder <t.s.maeder@gmail.com>

Author: tsmaeder

packages/core/src/common/path.spec.ts

@@ -271,10 +271,6 @@ describe('Path', () => {
         });
     });
 
-    it('Should not produce joined paths with double initial //', () => {
-        expect(new Path('/').join('/something/absolute').toString()).eq('/something/absolute');
-    });
-
     const linuxHome = '/home/test-user';
     const windowsHome = '/C:/Users/test-user';
 

packages/core/src/common/path.ts

@@ -215,7 +215,10 @@ export class Path {
         if (!relativePath) {
             return this;
         }
-        return new Path(this.raw + Path.separator + relativePath).normalize();
+        if (this.raw.endsWith(Path.separator)) {
+            return new Path(this.raw + relativePath);
+        }
+        return new Path(this.raw + Path.separator + relativePath);
     }
 
     /**