code review 1821041: runtime/tiny: style and doc tweaks

src/pkg/runtime/tiny/README

 This directory contains a simple example of how one might
 start Go running on bare hardware. There is currently code
 for 386 and arm.
 
 
 386
 
 It is very primitive but can run go/test/sieve.go, the concurrent
 prime sieve, on a uniprocessor.
 
 To run, first build the tools by running all.bash with GOARCH=386
 and GOOS set to your normal GOOS (linux, darwin).  Then:
 
         export GOOS=tiny
         cd $GOROOT/src/pkg/runtime
         make clean
         make install
         cd tiny
         8g $GOROOT/test/sieve.go
         8l sieve.8
         8l -a sieve.8 >sieve.asm        # can consult sieve.asm for debugging
         dd if=/dev/zero of=disk count=10000
         cat bootblock 8.out | dd of=disk conv=notrunc
 
 Use the built-in print(text string) function to print to the
 console.
 
+
 BOCHS
 
 You may have to tweak the .bochsrc depending on your system,
 and you may need to install the Bochs emulator.
 
     $ cp dot-bochsrc .bochsrc
     $ $EDITOR .bochsrc # tweak it if required
     $ bochs
 
 
 ORACLE xVM VIRTUALBOX
 
-Get VirtualBox installed, and the do:
+Install VirtualBox. Then:
 
-    ... build 'disk', described above
+    Build 'disk' (described above under '386').
+
     $ VBoxManage convertfromraw disk go-tiny.vdi
     $ VirtualBox
         create a new VM; as disk use the go-tiny.vdi image.
         start the vm.
 
+
 QEMU / KVM
 
 This should work the same for qemu and kvm (really: qemu-kvm).
 
-    ... build 'disk', described above
+    Build 'disk' (described above under '386').
+
     $ qemu -hda disk
 
 
 ARM
 
 First build the toolchain using GOARCH=arm and GOOS=linux. When
 you build your embedded code set GOARCH=tiny.
 
         export GOOS=tiny
         cd $GOROOT/src/pkg/runtime
@@ skipping 47 matching lines @@
     THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
     EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
     MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
     NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
     LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
     OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
     WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 
 http://pdos.csail.mit.edu/6.828/xv6/