typo and styling

Author: smeskos

_data/learning.yml

@@ -42,7 +42,7 @@ books:
       - link: /learn/building_programs/distributing
 
   - title: Setting up your OS
-    description: How to setup a Fortran developement environment in Windows, Linux and Mac.
+    description: How to setup a Fortran developement environment in Windows, Linux and macOS.
     category: Getting started
     link: /learn/os_setup
     pages:

learn/os_setup/install_gfortran.md

@@ -12,17 +12,17 @@ GFortran is the name of the [GNU Fortran project](https://gcc.gnu.org/fortran/).
 Three sources provide quick and easy way to install GFortran compiler on Windows:
 1. [http://www.equation.com](http://www.equation.com/servlet/equation.cmd?fa=fortran), provides 32 and 64-bit x86
  executables of the latest (10.2) gcc-version.
-2. [TDM GCC](https://jmeubank.github.io/tdm-gcc/articles/2020-03/9.2.0-release), provides 32 and 64-bit x86 executables of the 9.2 gcc-version.
-3. [Mingw-w64](http://mingw-w64.org/doku.php/download/mingw-builds) provides a 64-bit x86 executable of the 7.2 gcc-version.
+2. [TDM GCC](https://jmeubank.github.io/tdm-gcc/articles/2020-03/9.2.0-release), provides 32 and 64-bit x86 executables of the 9.2 gcc-version.
+3. [Mingw-w64](http://mingw-w64.org/doku.php/download/mingw-builds) provides a 64-bit x86 executable of the 7.2 gcc-version.
 
 In all the above choices, the process is straightforward—just download the installer and follow the installation wizard.
 
 ### Unix-like development on Windows
 For those familiar with a unix-like development environment, several emulation options are available on Windows each of which provide packages for gfortran:
 
 * __Cygwin:__ A runtime environment that provides POSIX compatibility to Windows;
-* __MSYS2:__ A collection of Unix-like development tools for compiling native Windows binaries;
-* __Windows Subsystem for Linux (WSL):__ An official compatibility layer for running Linux binary executables on Windows.
+* __MSYS2:__ A collection of Unix-like development tools for compiling native Windows binaries;
+* __Windows Subsystem for Linux (WSL):__ An official compatibility layer for running Linux binary executables on Windows.
 
 All of the above approaches provide access to common shells such as bash and development tools including GNU coreutils, Make, CMake, autotools, git, grep, sed, awk, ssh, etc.