“Just” print a Markdown table

[kellertuer]

Bug description

I have some table data in Jluia that I want to format a bit and “just” want to print that in markdown - plain markdown so it can get rendered later. I only manage to get the Markdown table when I put the output to code but then I also only get a code cell with the markdown code of the table not the table itself

Steps to reproduce

Use the JuliaNotebookRunnger (engine: julia) on the following .qmd where your Julia environment should at least have the two packages used installed

```{julia}
using Pkg;
cd(@__DIR__)
Pkg.activate(".");
Pkg.status() # just to illustrate package versions below
```
```{julia}
#| output: false
using PrettyTables, DataFrames
df = DataFrame(:a => [1,2,3], :b => [4,5,6])
```
```{julia}
# printing into normal output/code I get a nice markdown table,
# but this does only render in code and not as a nice markdown table
pretty_table(df, backend = :markdown, column_labels = ["A", "B"])
```
```{julia}
#| output: asis
# This `output: asis` should do the same as above without the code env, but always and only prints [TABLE]
# instead. Why? and how to fix this?
pretty_table(df, backend = :markdown, column_labels = ["A", "B"])
```

Actual behavior

      [a93c6f00] DataFrames v1.8.0
      [08abe8d2] PrettyTables v3.1.0

``` julia
# printing into normal output/code I get a nice markdown table,
# but this does only render in code and not as a nice markdown table
pretty_table(df, backend = :markdown, column_labels = ["A", "B"])
```

    | **A** | **B** |
    |------:|------:|
    |     1 |     4 |
    |     2 |     5 |
    |     3 |     6 |

``` julia
# This `output: asis` should do the same as above without the code env, but always and only prints [TABLE]
# instead. Why? and how to fix this?
pretty_table(df, backend = :markdown, column_labels = ["A", "B"])
```

[TABLE]

Expected behavior

The last output should be the second to last output with 4 spaces less upfront so I have a Markdown table (not the code of a markdown table) in the result if I continue with the markdown (e.g. through Julia Docu,emter.jl) - or as in the example above the output should read

``` julia
# This `output: asis` should do the same as above without the code env, but always and only prints [TABLE]
# instead. Why? and how to fix this?
pretty_table(df, backend = :markdown, column_labels = ["A", "B"])
```
| **A** | **B** |
|------:|------:|
|     1 |     4 |
|     2 |     5 |
|     3 |     6 |

(or the last 5 lines here instead of [TABLE] above)

Your environment

• VS Code (but should not matter) or just terminal
• Mac OS 26
• quarto 1.8.25
• QuartoNotebookRunner.jl 0.17.4
• Julia 1.12

[kellertuer]

An interesting addon: If I capture the result in a string and print that

#| output: asis
table_str = pretty_table(String, df, backend = :markdown, column_labels = ["A", "B"])
println("""
$(table_str)
""")

that also produces [TABLE] even if I add multiple empty lines around or any characters after the table.
But as soon as I do e.g.

#| output: asis
table_str = pretty_table(String, df, backend = :markdown, column_labels = ["A", "B"])
println("""
x
$(table_str)
""")

I get the plain output

x
| **A** | **B** |
|——:|——:|
| 1 | 4 |
| 2 | 5 |
| 3 | 6 |

i.e. without indentation. Sadly also with the x which I do not want.
So something makes a recognisable pure markdown table unprintable?

And even text upfront but an empty line before makes the print again fall back to [TABLE]. So soooomething is very strange here. when even stuff within an arbitrary as-is result gets replaced by TABLE

[kellertuer]

Ah, I maybe forgot, this is in commonmark, in gfm both would print an HTML Table instead (!?)