Use the recommended sbt.log.format property instead of noformat in the docs

src/sphinx/Detailed-Topics/Command-Line-Reference.rst

@@ -221,7 +221,7 @@ influence SBT execution. Also see :doc:`Launcher`.
        <tr>
          <td>
 
-``sbt.log.noformat``
+``sbt.log.format``
 
 .. raw:: html
 
@@ -235,15 +235,17 @@ Boolean
    </td>
          <td>
 
-false
+unset
 
 .. raw:: html
 
    </td>
          <td>
 
-If true, disable ANSI color codes. Useful on build servers or terminals
+If true, enable ANSI escape codes such as colors. 
+If false, disable them, which can be useful on build servers or terminals
 that don't support color.
+If unset, whether to use escape codes is automatically detected.
 
 .. raw:: html
 

src/sphinx/faq.rst

@@ -218,12 +218,12 @@ get output that looks like:
       [0m[ [0minfo [0m]  [0mSet current project to root
 
 or ansi codes are supported but you want to disable colored output. To
-completely disable ansi codes, set the ``sbt.log.noformat`` system
-property to ``true``. For example,
+completely disable ansi codes, set the ``sbt.log.format`` system
+property to ``false``. For example,
 
 .. code-block :: console
 
-    $ sbt -Dsbt.log.noformat=true
+    $ sbt -Dsbt.log.format=false
 
 How can I start a Scala interpreter (REPL) with sbt project configuration (dependencies, etc.)?
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