doc/INSTALL.md: Backquote d2

docs/INSTALL.md

@@ -1,6 +1,6 @@
 # install
 
-You may install D2 through any of the following methods.
+You may install `d2` through any of the following methods.
 
 <!-- toc -->
 - <a href="#installsh" id="toc-installsh">install.sh</a>
@@ -43,22 +43,21 @@ the install script is more vulnerable to than any other method of manual install
 The most secure installation method involves a second independent entity, i.e your OS
 package repos or Go's proxy server.
 
-We're careful shell programmers and are aware of the many footguns of the unix shell. Our
+We're careful shell programmers and are aware of the many footguns of the Unix shell. Our
 script was written carefully and with detail. For example, it is not vulnerable to partial
 execution and the entire script runs with `set -eu` and very meticulous quoting.
 
-It follows the XDG standards, installs d2 properly into a unix hierarchy path (defaulting
+It follows the XDG standards, installs `d2` properly into a Unix hierarchy path (defaulting
 to /usr/local though you can use ~/.local to avoid sudo if you'd like) and allows for easy
 uninstall.
 
 Some other niceties are that it'll tell you if you need to adjust `$PATH` or `$MANPATH` to
-access d2 and its manpages. It can also install
+access `d2` and its manpages. It can also install
 [TALA](https://github.com/terrastruct/tala) for you with `--tala`. You can also use it to
 install a specific version of `d2` with `--version`. Run it with `--help` for more more
 detailed docs on its various options and features.
 
-If you're still concerned, remember you can run with `--dry-run` to avoid executing
-anything permanent.
+If you're still concerned, remember you can run with `--dry-run` to avoid writing anything.
 
 The install script does not yet verify any signature on the downloaded release
 but that is coming soon. [#315](https://github.com/terrastruct/d2/issues/315)