debug: do not use special line height for the repl input

fixes #13067

src/vs/workbench/parts/debug/browser/media/repl.css

@@ -122,17 +122,18 @@
 .monaco-workbench.windows .repl .repl-input-wrapper:before {
 	content: '\203A'; /* character does not exist on windows */
 	font-size: 22px;
+	line-height: 18px;
 }
 
 .monaco-workbench.linux .repl .repl-input-wrapper:before {
 	content: '\276f';
 	font-size: 9px;
-	line-height: 22px;
+	line-height: 18px;
 }
 
 .monaco-workbench.mac .repl .repl-input-wrapper:before {
 	content: '\276f';
-	line-height: 22px;
+	line-height: 18px;
 }
 
 .monaco-workbench .repl .repl-input {

src/vs/workbench/parts/debug/electron-browser/repl.ts

@@ -62,7 +62,7 @@ export class Repl extends Panel implements IPrivateReplService {
 
 	private static HISTORY: replhistory.ReplHistory;
 	private static REFRESH_DELAY = 500; // delay in ms to refresh the repl for new elements to show
-	private static REPL_INPUT_INITIAL_HEIGHT = 22;
+	private static REPL_INPUT_INITIAL_HEIGHT = 19;
 	private static REPL_INPUT_MAX_HEIGHT = 170;
 
 	private toDispose: lifecycle.IDisposable[];
@@ -276,7 +276,6 @@ export class Repl extends Panel implements IPrivateReplService {
 			},
 			lineDecorationsWidth: 0,
 			scrollBeyondLastLine: false,
-			lineHeight: 21,
 			theme: this.themeService.getColorTheme(),
 			renderLineHighlight: false
 		};