Fix comments in GN standalone docs.

tools/gn/docs/standalone.md

Index: tools/gn/docs/standalone.md
diff --git a/tools/gn/docs/standalone.md b/tools/gn/docs/standalone.md
index faeb4260d7d442a1c437db0a2fdb8b3e0bf9ed8d..81dd89697d49b649634be47cc7877060ea160ccf 100644
--- a/tools/gn/docs/standalone.md
+++ b/tools/gn/docs/standalone.md
@@ -35,7 +35,10 @@ that then running GN in your subdirectory will configure a build for
 your subproject rather than for all of Chrome. This could be an
 advantage or a disadvantage.
 
-If you would rather avoid using this file, you can use the command-line
-flags `--root` and `--dotfile` to set these values.
+If you are in a directory with such a file and you want to not use it
+(e.g., to do the full Chrome build instead), you can use the command-line
+flags `--root` and `--dotfile` to set the values you want.
 
-# How the standalone and Chrome builds interact
+If you want a completely standalone build that has nothing to do w/ Chrome
+and doesn't use Chrome's //build files, you can look at an example in
+[//tools/gn/example](../example).