Issue #3469039 by amber himes matz: Copy edits for new DDEV content.

source/en/install-ddev.asciidoc

 [[install-ddev]]
-=== Setting Up An Environment with DDEV
+=== Setting Up an Environment with DDEV
 
 [role="summary"]
 How to set up a development site using DDEV, a local development environment for PHP applications.

source/en/install-dev-making.asciidoc

@@ -25,7 +25,7 @@ development purposes.
 installed. See <<install-tools>>.
 
 * If you want to use DDEV for your local environment follow the steps in
-<<install-ddev>>. Then, follow the instructions in the DDEV specific section
+<<install-ddev>>. Then, follow the instructions in the DDEV-specific section
 below.
 
 ==== Generic steps for making a development site
@@ -166,7 +166,7 @@ $config['system.site']['name'] =
   "Development Site for Anytown Farmers Market";
 ----
 
-==== DDEV specific steps for making a development site
+==== DDEV-specific steps for making a development site
 
 . In the directory where you copied all of the files from your live site, run the
   following command to configure, and start, the DDEV environment:

source/en/install-prepare.asciidoc

@@ -37,7 +37,7 @@ additional software tools first. See <<install-decide>> and <<install-tools>>.
 . Choose methods for downloading and installing the core software, from those
 listed in <<install-decide>>. The rest of these instructions apply to the
 Composer and manual download options; if you chose other options, like a
-one-click installer from a hosting provider consult the relevant documentation
+one-click installer from a hosting provider, consult the relevant documentation
 for any additional steps.
 
 . Set up a URL and hosting for your site on the server. Verify that the hosting