Add/update syntax highlight tags to fenced code blocks

docs/src/index.md

@@ -103,7 +103,7 @@ Also, it can use [Caching](@ref) to speed up the build even more.
 
 To use it, pass a `dir` to write HTML files for all notebook files (the files are recognized by the ".jl" extension and that the file starts with `### A Pluto.jl notebook ###`):
 
-```julia
+```julia-repl
 julia> using PlutoStaticHTML: build_notebooks
 
 julia> dir = joinpath("posts", "notebooks");
@@ -116,7 +116,7 @@ julia> build_notebooks(bopts);
 
 To run only specific notebooks, specify the `files`:
 
-```julia
+```julia-repl
 julia> files = ["notebook1.jl", "notebook2.jl"];
 
 julia> build_notebooks(bopts, files)
@@ -127,7 +127,7 @@ In CI, be sure to call this before using Franklin `serve` or `optimize`.
 
 For more options, such as `append_build_context` to add Julia and packages version information, you can pass [`OutputOptions`](@ref):
 
-```julia
+```julia-repl
 julia> oopts = OutputOptions(; append_build_context=true);
 
 julia> build_notebooks(bopts, files, oopts)

src/build.jl

@@ -459,7 +459,7 @@ Here, `files` is optional.
 When not passing `files`, then all Pluto notebooks in `dir` will be built.
 
 # Example
-```
+```julia-repl
 julia> dir = joinpath(homedir(), "my_project", "notebooks");
 
 julia> bopts = BuildOptions(dir);

src/module_doc.jl

@@ -4,7 +4,7 @@ let
 
         To quickly build two notebooks (evaluate all the code and convert the output to HTML), use:
 
-        ```
+        ```julia-repl
         julia> dir = joinpath("posts", "notebooks");
 
         julia> files = ["notebook1.jl", "notebook2.jl"];
@@ -14,7 +14,7 @@ let
 
         and to build all notebooks, use:
 
-        ```
+        ```julia-repl
         julia> build_notebooks(BuildOptions(dir))
         ```
 

src/output.jl

@@ -74,7 +74,7 @@ Arguments:
     This avoids inconsistent appearance of code blocks on web pages.
 - `convert_admonitions`:
     Convert admonitions such as
-    ```
+    ```markdown
     !!! note
         This is a note.
     ```