Hover previews for JSDoc comments show truncated @param parameter names when they include non-ASCII characters

[patricio-ezequiel-hondagneu-roig]

Issue Type: Bug

1. Create a new .ts file
2. Paste this sample

class Test {
	anotherMethod() {
		this.problematicMethod();
	}

	/**
	 * @param parameterWithoutDiacritics this will work
	 * @param parámetroConDiacríticos this will not
	 */
	problematicMethod(parameterWithoutDiacritics, parámetroConDiacríticos) {}
}

3. Hover the this.problematicMethod() method invocation on line 3
4. Observe how the name of the second parameter is truncated after the first non-ASCII character (in this case, the letter á)

This problem happens even with all extensions disabled.

VS Code version: Code 1.34.0 (a622c65, 2019-05-15T21:59:37.030Z)
OS version: Windows_NT x64 10.0.17763

System Info

Item	Value
CPUs	Intel(R) Core(TM) i5-7200U CPU @ 2.50GHz (4 x 2712)
GPU Status	2d_canvas: enabled checker_imaging: disabled_off flash_3d: enabled flash_stage3d: enabled flash_stage3d_baseline: enabled gpu_compositing: enabled multiple_raster_threads: enabled_on native_gpu_memory_buffers: disabled_software rasterization: enabled surface_synchronization: enabled_on video_decode: enabled webgl: enabled webgl2: enabled
Load (avg)	undefined
Memory (System)	7.87GB (3.79GB free)
Process Argv
Screen Reader	no
VM	0%

Extensions (24)

Extension	Author (truncated)	Version
Bookmarks	ale	10.4.3
scope-bar	amo	0.2.1
npm-intellisense	chr	1.3.0
dart-code	Dar	3.0.2
flutter	Dar	3.0.2
githistory	don	0.4.6
gitlens	eam	9.8.1
EditorConfig	Edi	0.13.0
vscode-npm-script	eg2	0.3.7
auto-rename-tag	for	0.0.15
todo-tree	Gru	0.0.132
expand-region	let	0.1.2
Angular-BeastCode	Mik	8.0.7
vscode-scss	mrm	0.6.2
vscode-typescript-tslint-plugin	ms-	1.1.0
vsliveshare	ms-	1.0.249
debugger-for-chrome	msj	4.11.3
vetur	oct	0.21.0
material-icon-theme	PKi	3.7.0
code-settings-sync	Sha	3.2.9
language-stylus	sys	1.11.0
stylus-supremacy	thi	2.12.7
vscode-icons	vsc	8.6.0
vscode-jumpy	wma	0.3.1

[mjbvz]

Confirmed with TS 3.5.0-dev.20190525

[mjbvz]

Looks like TS gives us the correct response so moving back to VS Code

Result: {
    "kind": "method",
    "kindModifiers": "",
    "start": {
        "line": 3,
        "offset": 8
    },
    "end": {
        "line": 3,
        "offset": 25
    },
    "displayString": "(method) Test.problematicMethod(parameterWithoutDiacritics: any, parámetroConDiacríticos: any): void",
    "documentation": "",
    "tags": [
        {
            "name": "param",
            "text": "parameterWithoutDiacritics this will work"
        },
        {
            "name": "param",
            "text": "parámetroConDiacríticos this will not"
        }
    ]
}