Minor formatting in installation guide.

docs/install.md

@@ -13,7 +13,7 @@ make
 sudo make install
 ```
 
-## OS X with Homebrew (http://brew.sh/)
+## OS X with [Homebrew](http://brew.sh/)
 ```sh
 brew install cmake --with-clang llvm
 ```
@@ -26,13 +26,13 @@ make
 make install
 ```
 
-##Windows with MSYS2 (https://msys2.github.io/)
-Install dependencies (replace x86_64 with i686 for 32-bit MSYS2 installs):
+##Windows with [MSYS2](https://msys2.github.io/)
+Install dependencies (replace `x86_64` with `i686` for 32-bit MSYS2 installs):
 ```sh
 pacman -S git mingw-w64-x86_64-cmake make mingw-w64-x86_64-toolchain mingw-w64-x86_64-clang
 ```
 
-Compile and install (replace mingw64 with mingw32 for 32-bit MSYS2 installs):
+Compile and install (replace `mingw64` with `mingw32` for 32-bit MSYS2 installs):
 ```sh
 git clone https://github.com/cppit/libclangmm.git
 cd libclangmm