updates to some examples

FossilOrigin-Name: 6efdcd9c4a9455a2f908fa727dae442aee8f7c3e5a5d6c4d09f1ad53960d9d89

example/AddingVectors.forth

@@ -10,7 +10,7 @@ This is an example adding two three element vectors.
 
 A test case:
 
-~~~
+```
 'a d:create #1 , #2 , #3 ,
 'b d:create #2 , #3 , #4 ,
 'c d:create #3 allot
@@ -20,5 +20,5 @@ A test case:
 &c fetch-next n:put nl
    fetch-next n:put nl
    fetch      n:put nl
-~~~
+```
 

example/Roo.forth

@@ -1,8 +1,7 @@
-#/bin/sh
+#!/bin/sh
 stty cbreak
 cat >/tmp/_roo.forth << 'EOF'
 
-
 # Roo: A Block Editor for RETRO
 
 This implements a block editor for RETRO. It provides a visual interface,
@@ -51,7 +50,6 @@ the currently loaded block.
 ~~~
 
 
-
 ## Server Communication
 
 With that done, it's now time for a word to load a block from the
@@ -80,13 +78,12 @@ And then words to actually talk to the server:
 
 ~~~
 :load-block     (-)   &Block SERVER selector<get> gopher:get drop ;
-:save-block     (-)   here SERVER selector<set> gopher:get drop ;
+:save-block     (-)   here   SERVER selector<set> gopher:get drop ;
 ~~~
 
 All done :)
 
 
-
 ## Modes
 
 The `Mode` variable will be used to track the current mode. I have
@@ -105,7 +102,6 @@ $C 'Mode var<n>
 ~~~
 
 
-
 ## Cursor & Positioning
 
 I need a way to keep track of where in the block the user currently is.
@@ -150,7 +146,6 @@ The last bit here is `insert-character` which inserts a character to
 ~~~
 
 
-
 ## Keyboard Handling
 
 Handling of keys is essential to using Roo. I chose to use a method that
@@ -251,7 +246,6 @@ if editing is finished.
 ~~~
 
 
-
 ## Display
 
 The block display is kept minimalistic. Each line is bounded by a single
@@ -302,7 +296,6 @@ The cursor display will be platform specific.
 ~~~
 
 
-
 ## The Final Piece
 
 All that's left is a single top level loop to tie it all together.
@@ -317,6 +310,7 @@ edit
 ~~~
 
 
+
 EOF
 rre /tmp/_roo.forth
 rm -f /tmp/_roo.forth

example/accumulator.forth

@@ -35,8 +35,8 @@ This removes the primitive stack shuffling, and leaves something that expresses
 Finally, here's a little test case:
 
 ```
-    #10 'foo acc
-    foo
-    foo
-    foo
+  #10 'foo acc
+  foo
+  foo
+  foo
 ```

example/is-palindrome.forth

@@ -12,7 +12,8 @@ and compare them.
 
 ~~~
 :s:palindrome? (s-f)
-  dup s:hash [ s:reverse s:hash ] dip eq? ;
+  [ s:hash ]
+  [ s:reverse s:hash ] bi eq? ;
 
 'ingirumimusnocteetconsumimurigni s:palindrome?
 ~~~