improve doc

Author: brunj7

README.md

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-# Developing a reproducible Shiny app
+## Developing a reproducible Shiny app
 
 Shiny application example adopting the recommendations of the "10 Quick Tips for Developing a Reproducible Shiny Application", Brun et al., 2025, PLOS Computational Biology
 
-We are reusing the Faithful Shiny app example (https://shiny.posit.co/r/gallery/start-simple/faithful/) provided as part of the R ***shiny*** package.
-This Shiny application displays eruption data for the Old Faithful geyser. 
+In this example, we are reusing the Faithful Shiny app example (https://shiny.posit.co/r/gallery/start-simple/faithful/) provided as part of the R ***shiny*** package.
+This Shiny application displays eruption data for the Old Faithful geyser.
+
+

data/metadata.md

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 Waiting time between eruptions and the duration of the eruption for the Old Faithful geyser in Yellowstone National Park, Wyoming, USA. These are heavily rounded times originally in seconds, where multiples of 5 are more frequent than expected under non-human measurement. There are many versions of this dataset around: Azzalini and Bowman (1990) use a more complete version.
 
 
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 ### Format
 
 A table with 272 observations on 2 variables.