Extension jebbs.plantuml: markdown highlight misunderstands plantuml string inside sh snippet

[awvalenti]

Type: Bug

Name: PlantUML
Id: jebbs.plantuml
Description: Rich PlantUML support for Visual Studio Code.
Version: 2.18.1
Publisher: jebbs
VS Marketplace Link: https://marketplace.visualstudio.com/items?itemName=jebbs.plantuml

Markdown highlighting understands a='
plantuml
' as language switching from shell script to plantuml. Then it highlights stuff incorrectly. See example below and attached GIF. Note that #wrong goes from gray to white when it should'nt.

# right
r4='plantuml'

w1='
  plantuml
'
# wrong

Extension version: 2.18.1
VS Code version: Code 1.92.1 (eaa41d57266683296de7d118f574d0c2652e1fc4, 2024-08-07T20:16:39.455Z)
OS version: Linux x64 5.15.0-118-generic snap
Modes:

System Info

Item	Value
CPUs	Intel(R) Core(TM) i7-10700T CPU @ 2.00GHz (16 x 2194)
GPU Status	2d_canvas: unavailable_software canvas_oop_rasterization: disabled_off direct_rendering_display_compositor: disabled_off_ok gpu_compositing: disabled_software multiple_raster_threads: enabled_on opengl: disabled_off rasterization: disabled_software raw_draw: disabled_off_ok skia_graphite: disabled_off video_decode: disabled_software video_encode: disabled_software vulkan: disabled_off webgl: unavailable_software webgl2: unavailable_software webgpu: disabled_off webnn: disabled_off
Load (avg)	0, 1, 0
Memory (System)	15.10GB (7.83GB free)
Process Argv	--no-sandbox --disable-extensions --crash-reporter-id e478582e-a30a-45d5-8978-2ed55806744f
Screen Reader	no
VM	0%
DESKTOP_SESSION	cinnamon
XDG_CURRENT_DESKTOP	X-Cinnamon
XDG_SESSION_DESKTOP	cinnamon
XDG_SESSION_TYPE	x11