Improve Markdown formatting. (#4366)

diff --git a/BUILD.md b/BUILD.md
index 8e82273..55e950e 100644
--- a/BUILD.md
+++ b/BUILD.md
@@ -1,20 +1,23 @@
 On Linux, install the development packages for FreeType, Cairo, and GLib. For
 example, on Ubuntu / Debian, you would do:
 
-$ sudo apt-get install meson pkg-config ragel gtk-doc-tools gcc g++ libfreetype6-dev libglib2.0-dev libcairo2-dev
+    $ sudo apt-get install meson pkg-config ragel gtk-doc-tools gcc g++ libfreetype6-dev libglib2.0-dev libcairo2-dev
 
 whereas on Fedora, RHEL, CentOS, and other Red Hat based systems you would do:
 
-$ sudo dnf install meson pkgconfig gtk-doc gcc gcc-c++ freetype-devel glib2-devel cairo-devel
+    $ sudo dnf install meson pkgconfig gtk-doc gcc gcc-c++ freetype-devel glib2-devel cairo-devel
 
 and on ArchLinux and Manjaro:
 
-$ sudo pacman -Suy meson pkg-config ragel gcc freetype2 glib2 cairo
+    $ sudo pacman -Suy meson pkg-config ragel gcc freetype2 glib2 cairo
 
-then use meson to build the project like `meson build && meson test -Cbuild`.
+On macOS:
 
-On macOS, `brew install pkg-config ragel gtk-doc freetype glib cairo meson`
-then use meson like above.
+    brew install pkg-config ragel gtk-doc freetype glib cairo meson
+
+Then use meson to build the project like:
+
+    meson build && meson test -Cbuild
 
 On Windows, meson can build the project like above if a working MSVC's cl.exe
 (`vcvarsall.bat`) or gcc/clang is already on your path, and if you use
@@ -22,8 +25,8 @@
 of the dependencies also.  It is recommended to install CMake either manually
 or via the Visual Studio installer when building with MSVC, using meson.
 
-Our CI configurations is also a good source of learning how to build HarfBuzz.
+Our CI configurations are also a good source of learning how to build HarfBuzz.
 
-There is also amalgam source provided with HarfBuzz which reduces whole process
-of building HarfBuzz like `g++ src/harfbuzz.cc -fno-exceptions` but there is
-not guarantee provided with buildability and reliability of features you get.
+There is also amalgamated source provided with HarfBuzz which reduces whole process
+of building HarfBuzz to `g++ src/harfbuzz.cc -fno-exceptions` but there is
+no guarantee provided with buildability and reliability of features you get.
diff --git a/README.md b/README.md
index cb075e3..099d4b7 100644
--- a/README.md
+++ b/README.md
@@ -29,8 +29,8 @@
 ## Download
 
 For tarball releases of HarfBuzz, look [here][3]. At the same place you
-will also find Win32/Win64 binary bundles that include libharfbuzz DLL,
-hb-view.exe, hb-shape.exe, and all dependencies.
+will also find Win32/Win64 binary bundles that include `libharfbuzz` DLL,
+`hb-view.exe`, `hb-shape.exe`, and all dependencies.
 
 The canonical source tree is available on [github][4].