Bug: "Emmet: Go to Matching Pair" doesn't work when the closing tag contains whitespace

[alexolog]

Issue Type: Bug

Try the following XML:

<tag>
</tag >

"Emmet: Go to Matching Pair" does not work when the cursor is in either the opening or the closing tag.
When the extra space is removed, the operation succeeds.

Note: Whitespace after the tag name is legal.
See https://stackoverflow.com/a/3314543/181238

VS Code version: Code 1.60.0 (e7d7e9a, 2021-09-01T10:43:02.136Z)
OS version: Linux x64 5.4.0-81-generic
Restricted Mode: No
Fetching remote diagnostics for 'SSH: ttdlxapp-tge21' failed: Canceled

System Info

Item	Value
CPUs	Intel(R) Core(TM) i7-10610U CPU @ 1.80GHz (2 x 2303)
GPU Status	2d_canvas: unavailable_software gpu_compositing: disabled_software multiple_raster_threads: disabled_off oop_rasterization: disabled_off opengl: disabled_off rasterization: disabled_software skia_renderer: enabled_on video_decode: disabled_software vulkan: disabled_off webgl: unavailable_software webgl2: unavailable_software
Load (avg)	0, 0, 0
Memory (System)	7.78GB (0.61GB free)
Process Argv	--crash-reporter-id 42997b2d-0a94-4c8d-943a-4cf28513cc90
Screen Reader	no
VM	100%
DESKTOP_SESSION	xubuntu
XDG_CURRENT_DESKTOP	XFCE
XDG_SESSION_DESKTOP	xubuntu
XDG_SESSION_TYPE	x11

Extensions (22)

Extension	Author (truncated)	Version
Bookmarks	ale	13.2.1
gitlens	eam	11.6.0
better-cpp-syntax	jef	1.15.6
vscode-docker	ms-	1.16.1
python	ms-	2021.9.1218897484
vscode-pylance	ms-	2021.9.1
jupyter	ms-	2021.8.2041215044
jupyter-keymap	ms-	1.0.0
remote-containers	ms-	0.194.0
remote-ssh	ms-	0.65.7
remote-ssh-edit	ms-	0.65.7
cmake-tools	ms-	1.8.1
cpptools	ms-	1.6.0
cpptools-extension-pack	ms-	1.0.0
text-power-tools	qcz	1.29.0
java	red	0.81.0
vscode-commons	red	0.0.6
vscode-xml	red	0.18.0
vc6-keybindings	sam	0.2.0
cmake	twx	0.0.17
vscodeintellicode	Vis	1.2.14
vscode-java-debug	vsc	0.35.0

(1 theme extensions excluded)

[vinku]

@rzhao271, I looked at it a bit,
It looks like the issue is in the external package emmetio/html-matcher.
Whenever there is whitespace in closing tag, it is returning a root with malformed html structure (closing tag is missing) and that is why vscode is not able to select the closing tag when the command "Emmet: Go To matching pair " is used.

I have another question: why are we using version 0.3.0 of emmetio/html-matcher when the latest version is 1.3.0