Avoids paragraphs for newlines in string tooltips

This better matches the native tooltip styling of newlines

Author: Eric Amodio

src/vs/base/browser/ui/iconLabel/iconLabel.ts

@@ -210,7 +210,11 @@ export class IconLabel extends Disposable {
 						};
 						const resolvedTooltip = await tooltip;
 						if (resolvedTooltip) {
-							hoverOptions = { text: resolvedTooltip, target, anchorPosition: AnchorPosition.BELOW };
+							hoverOptions = {
+								text: resolvedTooltip,
+								target,
+								anchorPosition: AnchorPosition.BELOW
+							};
 						}
 					}
 					if (hoverOptions) {

src/vs/base/common/htmlContent.ts

@@ -15,6 +15,11 @@ export interface IMarkdownString {
 	uris?: { [href: string]: UriComponents };
 }
 
+export const enum MarkdownStringTextNewlineStyle {
+	Paragraph = 0,
+	Break = 1,
+}
+
 export class MarkdownString implements IMarkdownString {
 	private readonly _isTrusted: boolean;
 	private readonly _supportThemeIcons: boolean;
@@ -41,11 +46,11 @@ export class MarkdownString implements IMarkdownString {
 	get isTrusted() { return this._isTrusted; }
 	get supportThemeIcons() { return this._supportThemeIcons; }
 
-	appendText(value: string): MarkdownString {
+	appendText(value: string, newlineStyle: MarkdownStringTextNewlineStyle = MarkdownStringTextNewlineStyle.Paragraph): MarkdownString {
 		// escape markdown syntax tokens: http://daringfireball.net/projects/markdown/syntax#backslash
 		this._value += (this._supportThemeIcons ? escapeCodicons(value) : value)
 			.replace(/[\\`*_{}[\]()#+\-.!]/g, '\\$&')
-			.replace(/\n/g, '\n\n');
+			.replace(/\n/g, newlineStyle === MarkdownStringTextNewlineStyle.Break ? '\\\n' : '\n\n');
 
 		return this;
 	}

src/vs/workbench/services/hover/browser/hoverWidget.ts

@@ -16,7 +16,7 @@ import { Widget } from 'vs/base/browser/ui/widget';
 import { AnchorPosition } from 'vs/base/browser/ui/contextview/contextview';
 import { IOpenerService } from 'vs/platform/opener/common/opener';
 import { IWorkbenchLayoutService } from 'vs/workbench/services/layout/browser/layoutService';
-import { MarkdownString } from 'vs/base/common/htmlContent';
+import { MarkdownString, MarkdownStringTextNewlineStyle } from 'vs/base/common/htmlContent';
 import { IInstantiationService } from 'vs/platform/instantiation/common/instantiation';
 import { MarkdownRenderer } from 'vs/editor/browser/core/markdownRenderer';
 
@@ -82,7 +82,7 @@ export class HoverWidget extends Widget {
 
 		const rowElement = $('div.hover-row.markdown-hover');
 		const contentsElement = $('div.hover-contents');
-		const markdown = typeof options.text === 'string' ? new MarkdownString().appendText(options.text) : options.text;
+		const markdown = typeof options.text === 'string' ? new MarkdownString().appendText(options.text, MarkdownStringTextNewlineStyle.Break) : options.text;
 
 		const mdRenderer = this._instantiationService.createInstance(
 			MarkdownRenderer,