Open
Description
When surrounded by curly braces, _ is parsed as an emph marker instead of being preserved as math syntax:
Reprex:
# Works
commonmark::markdown_xml(
"This $\\mathcal{R}_0$ and that $\\mathcal{R}_0$"
)
#> [1] "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n<!DOCTYPE document SYSTEM \"CommonMark.dtd\">\n<document xmlns=\"http://commonmark.org/xml/1.0\">\n <paragraph>\n <text xml:space=\"preserve\">This $\\mathcal{R}_0$ and that $\\mathcal{R}_0$</text>\n </paragraph>\n</document>\n"
# Doesn't work
commonmark::markdown_xml(
"This $\\mathcal{R}_{eff}$ and that $\\mathcal{R}_{eff}$"
)
#> [1] "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n<!DOCTYPE document SYSTEM \"CommonMark.dtd\">\n<document xmlns=\"http://commonmark.org/xml/1.0\">\n <paragraph>\n <text xml:space=\"preserve\">This $\\mathcal{R}</text>\n <emph>\n <text xml:space=\"preserve\">{eff}$ and that $\\mathcal{R}</text>\n </emph>\n <text xml:space=\"preserve\">{eff}$</text>\n </paragraph>\n</document>\n"Created on 2025-04-09 with reprex v2.1.1
Session info
sessioninfo::session_info()
#> ─ Session info ───────────────────────────────────────────────────────────────
#> setting value
#> version R Under development (unstable) (2025-03-18 r87998)
#> os Ubuntu 24.04.2 LTS
#> system x86_64, linux-gnu
#> ui X11
#> language en_US
#> collate en_GB.UTF-8
#> ctype en_GB.UTF-8
#> tz Europe/Paris
#> date 2025-04-09
#> pandoc 3.1.3 @ /bin/ (via rmarkdown)
#> quarto 1.6.39 @ /opt/quarto/bin/quarto
#>
#> ─ Packages ───────────────────────────────────────────────────────────────────
#> package * version date (UTC) lib source
#> cli 3.6.4 2025-02-13 [1] RSPM (R 4.6.0)
#> commonmark 1.9.5 2025-04-09 [1] Github (r-lib/commonmark@e033b75)
#> digest 0.6.37 2024-08-19 [1] RSPM (R 4.6.0)
#> evaluate 1.0.3 2025-01-10 [1] RSPM (R 4.6.0)
#> fastmap 1.2.0 2024-05-15 [1] RSPM (R 4.6.0)
#> fs 1.6.5 2024-10-30 [1] RSPM (R 4.6.0)
#> glue 1.8.0 2024-09-30 [1] RSPM (R 4.6.0)
#> htmltools 0.5.8.1 2024-04-04 [1] RSPM (R 4.6.0)
#> knitr 1.50 2025-03-16 [1] RSPM (R 4.6.0)
#> lifecycle 1.0.4 2023-11-07 [1] RSPM (R 4.6.0)
#> reprex 2.1.1 2024-07-06 [1] RSPM
#> rlang 1.1.5 2025-01-17 [1] RSPM (R 4.6.0)
#> rmarkdown 2.29 2024-11-04 [1] RSPM
#> sessioninfo 1.2.3 2025-02-05 [1] RSPM (R 4.6.0)
#> withr 3.0.2 2024-10-28 [1] RSPM (R 4.6.0)
#> xfun 0.51 2025-02-19 [1] RSPM (R 4.6.0)
#> yaml 2.3.10 2024-07-26 [1] RSPM (R 4.6.0)
#>
#> [1] /home/hugo/.local/share/R/x86_64-pc-linux-gnu-library/4.6
#> [2] /opt/R/devel/lib/R/library
#>
#> ──────────────────────────────────────────────────────────────────────────────Metadata
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