doc/languages-frameworks/*: add missing languages to code fences

convert shell -> ShellSession

doc/languages-frameworks/agda.section.md

@@ -3,7 +3,7 @@
 ## How to use Agda
 
 Agda can be installed from `agda`:
-```
+```ShellSession
 $ nix-env -iA agda
 ```
 
@@ -15,13 +15,13 @@ To use Agda with libraries, the `agda.withPackages` function can be used. This f
 
 For example, suppose we wanted a version of Agda which has access to the standard library. This can be obtained with the expressions:
 
-```
+```nix
 agda.withPackages [ agdaPackages.standard-library ]
 ```
 
 or
 
-```
+```nix
 agda.withPackages (p: [ p.standard-library ])
 ```
 
@@ -32,7 +32,7 @@ If you want to use a library in your home directory (for instance if it is a dev
 Agda will not by default use these libraries. To tell Agda to use the library we have some options:
 
 * Call `agda` with the library flag:
-```
+```ShellSession
 $ agda -l standard-library -i . MyFile.agda
 ```
 * Write a `my-library.agda-lib` file for the project you are working on which may look like:
@@ -49,7 +49,7 @@ More information can be found in the [official Agda documentation on library man
 Agda modules can be compiled with the `--compile` flag. A version of `ghc` with `ieee754` is made available to the Agda program via the `--with-compiler` flag.
 This can be overridden by a different version of `ghc` as follows:
 
-```
+```nix
 agda.withPackages {
  pkgs = [ ... ];
  ghc = haskell.compiler.ghcHEAD;
@@ -80,12 +80,12 @@ By default, Agda sources are files ending on `.agda`, or literate Agda files end
 ## Adding Agda packages to Nixpkgs
 
 To add an Agda package to `nixpkgs`, the derivation should be written to `pkgs/development/libraries/agda/${library-name}/` and an entry should be added to `pkgs/top-level/agda-packages.nix`. Here it is called in a scope with access to all other Agda libraries, so the top line of the `default.nix` can look like:
-```
+```nix
 { mkDerivation, standard-library, fetchFromGitHub }:
 ```
 and `mkDerivation` should be called instead of `agdaPackages.mkDerivation`. Here is an example skeleton derivation for iowa-stdlib:
 
-```
+```nix
 mkDerivation {
  version = "1.5.0";
  pname = "iowa-stdlib";

doc/languages-frameworks/dotnet.section.md

@@ -4,7 +4,7 @@
 
 For local development, it's recommended to use nix-shell to create a dotnet environment:
 
-```
+```nix
 # shell.nix
 with import <nixpkgs> {};
 
@@ -20,7 +20,7 @@ mkShell {
 
 It's very likely that more than one sdk will be needed on a given project. Dotnet provides several different frameworks (E.g dotnetcore, aspnetcore, etc.) as well as many versions for a given framework. Normally, dotnet is able to fetch a framework and install it relative to the executable. However, this would mean writing to the nix store in nixpkgs, which is read-only. To support the many-sdk use case, one can compose an environment using `dotnetCorePackages.combinePackages`:
 
-```
+```nix
 with import <nixpkgs> {};
 
 mkShell {
@@ -37,7 +37,7 @@ mkShell {
 
 This will produce a dotnet installation that has the dotnet 3.1, 3.0, and 2.1 sdk. The first sdk listed will have it's cli utility present in the resulting environment. Example info output:
 
-```
+```ShellSesssion
 $ dotnet --info
 .NET Core SDK (reflecting any global.json):
  Version: 3.1.101

doc/languages-frameworks/idris.section.md

@@ -4,7 +4,7 @@
 
 The easiest way to get a working idris version is to install the `idris` attribute:
 
-```
+```ShellSesssion
 $ # On NixOS
 $ nix-env -i nixos.idris
 $ # On non-NixOS
@@ -21,38 +21,38 @@ self: super: {
 
 And then:
 
-```
+```ShellSesssion
 $ # On NixOS
 $ nix-env -iA nixos.myIdris
 $ # On non-NixOS
 $ nix-env -iA nixpkgs.myIdris
 ```
 
 To see all available Idris packages:
-```
+```ShellSesssion
 $ # On NixOS
 $ nix-env -qaPA nixos.idrisPackages
 $ # On non-NixOS
 $ nix-env -qaPA nixpkgs.idrisPackages
 ```
 
 Similarly, entering a `nix-shell`:
-```
+```ShellSesssion
 $ nix-shell -p 'idrisPackages.with-packages (with idrisPackages; [ contrib pruviloj ])'
 ```
 
 ## Starting Idris with library support
 
 To have access to these libraries in idris, call it with an argument `-p <library name>` for each library:
 
-```
+```ShellSesssion
 $ nix-shell -p 'idrisPackages.with-packages (with idrisPackages; [ contrib pruviloj ])'
 [nix-shell:~]$ idris -p contrib -p pruviloj
 ```
 
 A listing of all available packages the Idris binary has access to is available via `--listlibs`:
 
-```
+```ShellSesssion
 $ idris --listlibs
 00prelude-idx.ibc
 pruviloj
@@ -105,7 +105,7 @@ build-idris-package {
 
 Assuming this file is saved as `yaml.nix`, it's buildable using
 
-```
+```ShellSesssion
 $ nix-build -E '(import <nixpkgs> {}).idrisPackages.callPackage ./yaml.nix {}'
 ```
 
@@ -121,7 +121,7 @@ with import <nixpkgs> {};
 
 in another file (say `default.nix`) to be able to build it with
 
-```
+```ShellSesssion
 $ nix-build -A yaml
 ```
 
@@ -133,7 +133,7 @@ Specifically, you can set `idrisBuildOptions`, `idrisTestOptions`, `idrisInstall
 
 For example you could set
 
-```
+```nix
 build-idris-package {
  idrisBuildOptions = [ "--log" "1" "--verbose" ]
 

doc/languages-frameworks/python.section.md

@@ -78,7 +78,7 @@ $ nix-shell -p 'python38.withPackages(ps: with ps; [ numpy toolz ])'
 By default `nix-shell` will start a `bash` session with this interpreter in our
 `PATH`, so if we then run:
 
-```
+```Python console
 [nix-shell:~/src/nixpkgs]$ python3
 Python 3.8.1 (default, Dec 18 2019, 19:06:26)
 [GCC 9.2.0] on linux
@@ -89,7 +89,7 @@ Type "help", "copyright", "credits" or "license" for more information.
 Note that no other modules are in scope, even if they were imperatively
 installed into our user environment as a dependency of a Python application:
 
-```
+```Python console
 >>> import requests
 Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
@@ -145,8 +145,8 @@ print(f"The dot product of {a} and {b} is: {np.dot(a, b)}")
 Executing this script requires a `python3` that has `numpy`. Using what we learned
 in the previous section, we could startup a shell and just run it like so:
 
-```
-nix-shell -p 'python38.withPackages(ps: with ps; [ numpy ])' --run 'python3 foo.py'
+```ShellSesssion
+$ nix-shell -p 'python38.withPackages(ps: with ps; [ numpy ])' --run 'python3 foo.py'
 The dot product of [1 2] and [3 4] is: 11
 ```
 

doc/languages-frameworks/qt.section.md

@@ -103,7 +103,7 @@ supported Qt version.
 ### Example adding a Qt library {#qt-library-all-packages-nix}
 
 The following represents the contents of `qt5-packages.nix`.
-```
+```nix
 {
  # ...
 
@@ -133,7 +133,7 @@ to select the Qt 5 version used for the application.
 ### Example adding a Qt application {#qt-application-all-packages-nix}
 
 The following represents the contents of `qt5-packages.nix`.
-```
+```nix
 {
  # ...
 
@@ -144,7 +144,7 @@ The following represents the contents of `qt5-packages.nix`.
 ```
 
 The following represents the contents of `all-packages.nix`.
-```
+```nix
 {
  # ...