Make package install instructions bigger in tutorials (#82)

Make package install instructions bigger in curve-fit.md, tabular-data.md, jwst-image-scale-bar.md.

Author: abhro

docs/src/tutorials/curve-fit.md

@@ -11,8 +11,14 @@ This tutorial will demonstrate fitting data with a straight line (linear regress
 * [`Turing`](https://turing.ml/stable/): we'll use this package for Bayesian modelling.
 * [`PairPlots`](https://github.com/sefffal/PairPlots.jl): we'll use this for creating a corner plot of the posterior from our Bayesian models.
 
-You can install the necessary packages by running Julia, and typing `]` to enter Pkg-mode. Then: `add Plots Optimization OptimizationOptimJL Turing PairPlots`.
-Alternatively, you can run `using Pkg; Pkg.add(["Plots", "Optimization", "OptimizationOptimJL", "Turing", "PairPlots"])`.
+You can install the necessary packages by running Julia, and typing `]` to enter Pkg-mode. Then:
+```julia-repl
+pkg> add Plots Optimization OptimizationOptimJL Turing PairPlots
+```
+Alternatively, you can run
+```julia
+using Pkg; Pkg.add(["Plots", "Optimization", "OptimizationOptimJL", "Turing", "PairPlots"])
+```
 In your own code, you most likely won't need all of these packages. Pick and choose the one that best fits your problem.
 
 If you will be using these tools as part of a bigger project, it's strongly recommended to create a [Julia Project](https://pkgdocs.julialang.org/v1/environments/) to record package versions. If you're just experimenting, you can create a temporary project by running `] activate --temp`.

docs/src/tutorials/jwst-image-scale-bar.md

@@ -9,10 +9,19 @@ Let's get started!
 * [`AstroImages`](http://juliaastro.org/AstroImages/stable/): we'll use this package to load and display the image
 * [`Plots`](https://docs.juliaplots.org/stable/): we'll use this package to display coordinates along the image and add the scalebar
 
-You can install the necessary packages by running Julia, and typing `]` to enter Pkg-mode. Then: `add AstroImages Plots`.
-Alternatively, you can run `using Pkg; Pkg.add(["AstroImages", "Plots"])`.
+You can install the necessary packages by running Julia, and typing `]` to enter Pkg-mode. Then:
+```julia-repl
+pkg> add AstroImages Plots
+```
+Alternatively, you can run
+```julia
+using Pkg; Pkg.add(["AstroImages", "Plots"])
+```
 
-If you will be using these tools as part of a bigger project, it's strongly recommended to create a [Julia Project](https://pkgdocs.julialang.org/v1/environments/) to record package versions.  If you're just experimenting, you can create a temporary project by running `] activate --temp`.
+If you will be using these tools as part of a bigger project, it's strongly recommended to create a [Julia Project](https://pkgdocs.julialang.org/v1/environments/) to record package versions.  If you're just experimenting, you can create a temporary project by running
+```julia-repl
+pkg> activate --temp
+```
 
 If you're using [Pluto notebooks](https://github.com/fonsp/Pluto.jl), installing and recording package versions in a project are handled for you automatically.
 

docs/src/tutorials/tabular-data.md

@@ -2,7 +2,7 @@
 
 Tables are a common way to represent various forms of catalogs. One common format for storing this data in astronomy is as a FITS file.
 
-In these examples, we will fetch and load the Hipparcos-GAIA Catalog of Accelerations [(HGCA, Brandt et al 2021])](https://iopscience.iop.org/article/10.3847/1538-4365/abf93c).
+In these examples, we will fetch and load the Hipparcos-GAIA Catalog of Accelerations [(HGCA, Brandt et al 2021)](https://iopscience.iop.org/article/10.3847/1538-4365/abf93c).
 This catalog cross matches stars from the Hipparcos and GAIA catalogs in order to calculate the long term astrometric proper motion anomaly; that is, the star's deviation from straight line motion in the plane of the sky over the ~20 baseline between the two missions.
 
 A wide range of tabular data formats are supported in Julia under a common [Tables.jl interface](https://tables.juliadata.org). For example, 
@@ -16,8 +16,14 @@ A wide range of tabular data formats are supported in Julia under a common [Tabl
 * [`Plots`](https://docs.juliaplots.org/stable/): we'll use this package to visualize the contents of the table
 * [`AstroLib`](https://juliaastro.org/AstroLib/stable/): general utility package. We'll use a helper function to compute a map projection.
 
-You can install the necessary packages by running Julia, and typing `]` to enter Pkg-mode. Then: `add FITSIO DataFrames Plots AstroLib`.
-Alternatively, you can run `using Pkg; Pkg.add(["FITSIO", "DataFrames", "Plots", "AstroLib"])`.
+You can install the necessary packages by running Julia, and typing `]` to enter Pkg-mode. Then:
+```julia-repl
+pkg> add FITSIO DataFrames Plots AstroLib
+```
+Alternatively, you can run
+```julia
+using Pkg; Pkg.add(["FITSIO", "DataFrames", "Plots", "AstroLib"])
+```
 
 If you will be using these tools as part of a larger project, it's strongly recommended to create a [Julia Project](https://pkgdocs.julialang.org/v1/environments/) to record package versions.  If you're just experimenting, you can create a temporary project by running `] activate --temp`.