fix missing #-encode in URI.file factory

src/vs/base/common/uri.ts

@@ -343,6 +343,7 @@ export class URI implements UriComponents {
 		// escape some vital characters
 		authority = authority.replace(/%/g, '%25');
 		path = path.replace(/%/g, '%25');
+		path = path.replace(/#/g, '%23');
 
 		if (!isWindows) {
 			path = path.replace(/\\/g, '%5C');

src/vs/base/test/node/uri.test.ts

@@ -528,6 +528,7 @@ suite('URI', () => {
 		assertFileUri('/foo/%A0.txt'); // %A0 -> invalid
 		assertFileUri('/foo/ü.txt');
 		assertFileUri('/foo/ß.txt');
+		assertFileUri('/my/c#project/d.cs');
 		// assertFileUri('foo'); nodejs resolves the path first
 		if (!isWindows) {
 			assertFileUri('/c\\win\\path');
@@ -541,6 +542,7 @@ suite('URI', () => {
 		assertFsPath('file:///foö/bar');
 		assertFsPath('file:///fo%C3%B6/bar');
 		assertFsPath('file:///');
+		assertFsPath('file:///my/c%23project/c.cs');
 
 		// assertFsPath('file:///fo%2f/bar'); not allowed in nodejs