diff --git a/tools/README.txt b/tools/README.txt
index ddde76fab7..7c5f951724 100644
--- a/tools/README.txt
+++ b/tools/README.txt
@@ -570,45 +570,45 @@ refresh.sh
 testbuild.sh
 ------------
 
-  This script automates building of a sequence of configuration.  The
-  intent is simply to assure that the set of configurations build
-  correctly.  The -h option lists the usage:
+  This script automates building of a set of configurations.  The intent is
+  simply to assure that the set of configurations build correctly.  The -h
+  option shows the usage:
 
-     $ ./testbuild.sh -h
+    $ ./testbuild.sh -h
 
-     USAGE: ./testbuild.sh [-w|l] [-c|n] <testlist-file>
-     USAGE: ./testbuild.sh -h
+    USAGE: ./testbuild.sh [-w|l] [-c|n] <testlist-file>
+    USAGE: ./testbuild.sh -h
 
-     where
-       -w|l selects Windows (w) or Linux (l).  Default: Linux
-       -c|n selects Windows native (n) or Cygwin (c).  Default Cygwin
-       -h will show this help test and terminate
-       <testlist-file> selects the list of configurations to test.  No default
+    where
+      -w|l selects Windows (w) or Linux (l).  Default: Linux
+      -c|n selects Windows native (n) or Cygwin (c).  Default Cygwin
+      -h will show this help test and terminate
+      <testlist-file> selects the list of configurations to test.  No default
 
-     Your PATH variable must include the path to both the build tools and the
-     kconfig-frontends tools
+    Your PATH variable must include the path to both the build tools and the
+    kconfig-frontends tools
 
-   These script needs essential two pieces of information.
+  These script needs two pieces of information.
 
-     a. A description of the platform that you are testing on.  This
-        description is provided by the optiona -w, -l, -c, and -n options.
-     b. A list of builds to perform.  That list is provided by a test list
-        file.  The final, non-optional parameter <testlist-file> provides
-        the path to that file.
+    a. A description of the platform that you are testing on.  This
+       description is provided by the optional -w, -l, -c, and -n options.
+    b. A list of configurations to build.  That list is provided by a test
+       list file.  The final, non-optional parameter, <testlist-file>,
+       provides the path to that file.
 
-   The test list file is a sequence of build descriptons, one per line.  One
-   build descriptions consists of two comma separated values.  For example:
+  The test list file is a sequence of build descriptons, one per line.  One
+  build descriptions consists of two comma separated values.  For example:
 
-     stm32f429i-disco/nsh,CONFIG_ARMV7M_TOOLCHAIN_GNU_EABIL
+    stm32f429i-disco/nsh,CONFIG_ARMV7M_TOOLCHAIN_GNU_EABIL
 
-   The first value is the usual configuration description which of then
-   form <board-name>/<configuration-name> and must correspond to a
-   configuration in the nuttx/configs directory.
+  The first value is the usual configuration description of the form
+  form <board-name>/<configuration-name> and must correspond to a
+  configuration in the nuttx/configs directory.
 
-   The second value is valid name for a toolchain configuration to use
-   when building the configuration.  The set of valid toolchain
-   configuration names depnds on the underlying architecture of the
-   configured board.
+  The second value is valid name for a toolchain configuration to use
+  when building the configuration.  The set of valid toolchain
+  configuration names depends on the underlying architecture of the
+  configured board.
 
 zipme.sh
 --------