format to 80 character line limit

`prettier --prose-wrap always --print-width 80 --write docs/src/cookbook/vcpkg.md` mostly worked, but removed indenting for some code blocks which I manually restored.

docs/src/cookbook/vcpkg.md

@@ -1,83 +1,97 @@
 # build tectonic with vcpkg on macOS
 
-
-This tutorial will walk you through how to build a *mostly* staticly linked `tectonic` binary on macOS. Why does this matter? Static binaries are more portable and so free you from having to support complex user environments. Thanks to [mcgoo's work](https://github.com/tectonic-typesetting/tectonic/pull/420) we can use `vcpkg`. [vcpkg](https://vcpkg.readthedocs.io/en/latest/) is a C/C++ package manager from Microsoft.
-
+This tutorial will walk you through how to build a _mostly_ staticly linked
+`tectonic` binary on macOS. Why does this matter? Static binaries are more
+portable and so free you from having to support complex user environments.
+Thanks to
+[mcgoo's work](https://github.com/tectonic-typesetting/tectonic/pull/420) we can
+use `vcpkg`. [vcpkg](https://vcpkg.readthedocs.io/en/latest/) is a C/C++ package
+manager from Microsoft.
 
 ## prerequisites
 
-This guide assumes you have [git](https://git-scm.com/) installed and are comfortable using the command-line. You'll also need to install [homebrew](https://brew.sh/) to install for `vcpkg`'s gcc dependency. Package management is *fun*.
+This guide assumes you have [git](https://git-scm.com/) installed and are
+comfortable using the command-line. You'll also need to install
+[homebrew](https://brew.sh/) to install for `vcpkg`'s gcc dependency. Package
+management is _fun_.
 
 1. install `gcc`:
+
 ```sh
- brew install gcc
+brew install gcc
 ```
 
 ## setting up your environment
 
-1. Install  vcpkg
-	1. Clone the vcpkg repository:
-		```sh
-		git clone https://github.com/Microsoft/vcpkg
-		```
-	2. Install it for your system:
-		```sh
-		./bootstrap-vcpkg.sh
-		```
-
-2. Install `tectonic` dependencies using vcpkg.
-	* Run the following command in your checkout of the `vcpkg` repository
+1. Install vcpkg
+
+   1. Clone the vcpkg repository:
+      ```sh
+      git clone https://github.com/Microsoft/vcpkg
+      ```
+   2. Install it for your system:
+      ```sh
+      ./bootstrap-vcpkg.sh
+      ```
+
+2. Install `tectonic` dependencies using vcpkg. \* Run the following command in
+   your checkout of the `vcpkg` repository
+   `sh ./vcpkg install freetype harfbuzz\[icu,graphite2\]` It should print
+   something like the following:
+
 	```sh
-	./vcpkg install freetype harfbuzz\[icu,graphite2\]
+	$ ./vcpkg install freetype harfbuzz\[icu,graphite2\]
+	The following packages will be built and installed:
+  	* bzip2[core]:x64-osx
+    	freetype[core]:x64-osx
+  	* gettext[core]:x64-osx
+  	* graphite2[core]:x64-osx
+    	harfbuzz[core,graphite2,icu,ucdn]:x64-osx
+  	* icu[core]:x64-osx
+  	* libiconv[core]:x64-osx
+  	* libpng[core]:x64-osx
+  	* ragel[core]:x64-osx
+  	* zlib[core]:x64-osx
+	Additional packages (*) will be modified to complete this operation.
+	Starting package 1/10: graphite2:x64-osx
+	Building package graphite2[core]:x64-osx...
 	```
-It should print something like the following:
-```sh
-$ ./vcpkg install freetype harfbuzz\[icu,graphite2\]
-The following packages will be built and installed:
-  * bzip2[core]:x64-osx
-    freetype[core]:x64-osx
-  * gettext[core]:x64-osx
-  * graphite2[core]:x64-osx
-    harfbuzz[core,graphite2,icu,ucdn]:x64-osx
-  * icu[core]:x64-osx
-  * libiconv[core]:x64-osx
-  * libpng[core]:x64-osx
-  * ragel[core]:x64-osx
-  * zlib[core]:x64-osx
-Additional packages (*) will be modified to complete this operation.
-Starting package 1/10: graphite2:x64-osx
-Building package graphite2[core]:x64-osx...
-```
 
 ## build tectonic
 
-Now we only need to configure tectonic so it knows we are using `vcpkg` to build the binary.
+Now we only need to configure tectonic so it knows we are using `vcpkg` to build
+the binary.
+
 1. Run `cargo build` with the appropriate environment variables:
-	```sh
-	TECTONIC_DEP_BACKEND="vcpkg" VCPKG_ROOT=/Users/me/vcpkg/ cargo build --release
-	```
+   ```sh
+   TECTONIC_DEP_BACKEND="vcpkg" VCPKG_ROOT=/Users/me/vcpkg/ cargo build --release
+   ```
 
 You'll need to set `VCPKG_ROOT` to the full path of your vcpkg checkout.
-`TECTONIC_DEP_BACKEND="vcpkg"` tells `tectonic` to use `vcpkg` instead of trying to resolve the libraries using `pkgconfig`. `VCPKG_ROOT=/Users/me/vcpkg/` is the root of the `vcpkg` tree where we just installed the required libraries.
+`TECTONIC_DEP_BACKEND="vcpkg"` tells `tectonic` to use `vcpkg` instead of trying
+to resolve the libraries using `pkgconfig`. `VCPKG_ROOT=/Users/me/vcpkg/` is the
+root of the `vcpkg` tree where we just installed the required libraries.
+
+This will take a couple minutes but should eventually print something like:
 
-This will take a couple minutes but should eventuall print something like:
 ```sh
     Finished release [optimized] target(s) in 3m 39s
 ```
 
-Congratulations! You should now have a mostly staticly linked binary in `target/release` suitable for sharing with users or whatever your needs are.
-
+Congratulations! You should now have a mostly staticly linked binary in
+`target/release` suitable for sharing with users or whatever your needs are.
 
 ## caveats
 
-I say *mostly* staticly linked because the binary itself presumes system libraries.
-You can observe those links by executing `otool` on a given binary:
+I say _mostly_ staticly linked because the binary itself presumes system
+libraries. You can observe those links by executing `otool` on a given binary:
+
 ```sh
 otool -L target/release/tectonic
-
 ```
 
 In my case it printed the following:
+
 ```sh
 target/release/tectonic:
 	/System/Library/Frameworks/Foundation.framework/Versions/C/Foundation (compatibility version 300.0.0, current version 1454.98.0)
@@ -91,5 +105,3 @@ target/release/tectonic:
 	/usr/lib/libresolv.9.dylib (compatibility version 1.0.0, current version 1.0.0)
 	/usr/lib/libobjc.A.dylib (compatibility version 1.0.0, current version 228.0.0)
 ```
-
-