Fix heading level of 'Try' section

It was agreed to be '## Try:' but there were many files where it was
'### Try:'. This has been corrected.

2011/akari/README.md

@@ -12,7 +12,7 @@ make
 ```
 
 
-### Try:
+## Try:
 
 ```sh
 ./try.sh

2011/blakely/README.md

@@ -14,7 +14,7 @@ Zoom out and make your terminal window 53 or more lines deep.
 ```
 
 
-### Try:
+## Try:
 
 ```sh
 ./try.sh

2011/borsanyi/README.md

@@ -23,7 +23,7 @@ For more detailed information see [2011 borsanyi in bugs.md](/bugs.md#2011-borsa
 ```
 
 
-### Try:
+## Try:
 
 ```sh
 ./try.sh

2011/dlowe/README.md

@@ -32,7 +32,7 @@ Then to use `trained.net`:
 ```
 
 
-### Try:
+## Try:
 
 Try these pre-trained networks:
 

2011/eastman/README.md

@@ -12,7 +12,7 @@ make
 ```
 
 
-### Try:
+## Try:
 
 Quit the program.  Resize your terminal window.  Run it again.
 

2011/fredriksson/README.md

@@ -23,7 +23,7 @@ For more detailed information see [2011 fredriksson in bugs.md](/bugs.md#2011-fr
 ```
 
 
-### Try:
+## Try:
 
 ```sh
 ./try.sh

2011/goren/README.md

@@ -12,7 +12,7 @@ echo "some text" | ./goren
 ```
 
 
-### Try:
+## Try:
 
 ```sh
 ./try.sh

2011/hamaji/README.md

@@ -12,7 +12,7 @@ make
 ```
 
 
-### Try:
+## Try:
 
 ```sh
 ./try.sh

2011/hou/README.md

@@ -12,7 +12,7 @@ make
 ```
 
 
-### Try:
+## Try:
 
 ```sh
 ./try.sh

2011/konno/README.md

@@ -12,7 +12,7 @@ make
 ```
 
 
-### Try:
+## Try:
 
 ```sh
 ./try.sh

2011/richards/README.md

@@ -23,7 +23,7 @@ For more detailed information see [2011 richards in bugs.md](/bugs.md#2011-richa
 ```
 
 
-### Try:
+## Try:
 
 ```sh
 echo '10 9 8 7 6 5 4 3 2 1*p*p*p*p*p*p*p*p*p' | ./richards

2011/vik/README.md

@@ -26,7 +26,7 @@ For more detailed information see [2011 vik in bugs.md](/bugs.md#2011-vik).
 ```
 
 
-### Try:
+## Try:
 
 ```sh
 ./vik randowan.mod | mplayer -demuxer rawaudio -

2011/zucker/README.md

@@ -15,7 +15,7 @@ binary mode from text mode. See [alternate code](#alternate-code) below.
 ```
 
 
-### Try:
+## Try:
 
 ```sh
 ./zucker "Hello\!\!\!" > hello.ppm