Fix missing quotes on Python parameters in remote sensing tutorials

[Valyrian-Code]

The remote sensing tutorials (EN and PT) had 16 unquoted string parameters in two Python code blocks : r.colors and i.vi, that would raise NameError when executed.

r.colors block (×6 calls in each file):

• map=landsat8_2024_B2 → map="landsat8_2024_B2"
• color=grey → color="grey"

i.vi block:

• output=Flagstaff_NDVI → output="Flagstaff_NDVI"
• viname=ndvi → viname="ndvi"
• red=landsat8_2024_B4 → red="landsat8_2024_B4"
• nir=landsat8_2024_B5 → nir="landsat8_2024_B5"

Applied to both GRASS_remotesensing.qmd and GRASS_remotesensing_pt.qmd. The i.pca quoting fix in the same files is covered separately in PR #125.

[Copilot]

Pull request overview

Note

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Updates GRASS GIS tutorial Python snippets to pass raster names and color rules as proper string arguments, aligning the examples with grass.script run_command expectations.

Changes:

• Quote map and color arguments in gs.run_command("r.colors", ...) examples.
• Quote output, viname, red, and nir arguments in gs.run_command("i.vi", ...) examples.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
content/tutorials/remote_sensing_visualization/GRASS_remotesensing_pt.qmd	Fixes Python example arguments by converting unquoted identifiers to strings.
content/tutorials/remote_sensing_visualization/GRASS_remotesensing.qmd	Applies the same string-quoting fixes to the English tutorial version.

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