Fixes #1246 - bad encoding caused missing fallback

CHANGELOG.md

@@ -25,6 +25,7 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/) and this p
 
 ### Fixed
 
+- Fixes [#1246](https://github.com/eamodio/vscode-gitlens/issues/1246) - Gutter Blame avatar does not use Gravatar fallback style
 - Fixes [#1208](https://github.com/eamodio/vscode-gitlens/issues/1208) - Connect to Github notification is noisy
 - Fixes [#526](https://github.com/eamodio/vscode-gitlens/issues/526) - FAILED in gitlens.outputLevel=verbose; likely due to regex not in quotes
 - Fixes [#1222](https://github.com/eamodio/vscode-gitlens/issues/1222) - GitLens: Open Associated Pull Request doesn't work

src/annotations/gutterBlameAnnotationProvider.ts

@@ -210,13 +210,14 @@ export class GutterBlameAnnotationProvider extends BlameAnnotationProviderBase {
 	) {
 		let avatarDecoration = map.get(commit.email!);
 		if (avatarDecoration == null) {
+			const url = (await commit.getAvatarUri({ defaultStyle: gravatarDefault, size: 16 })).toString(true);
 			avatarDecoration = {
 				contentText: '',
 				height: '16px',
 				width: '16px',
-				textDecoration: `none;position:absolute;top:1px;left:5px;background:url(${(
-					await commit.getAvatarUri({ defaultStyle: gravatarDefault })
-				).toString()});background-size:16px 16px;margin-left: 0 !important`,
+				textDecoration: `none;position:absolute;top:1px;left:5px;background:url(${encodeURI(
+					url,
+				)});background-size:16px 16px;margin-left: 0 !important`,
 			};
 			map.set(commit.email!, avatarDecoration);
 		}