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.

2004/anonymous/README.md

@@ -19,7 +19,7 @@ format that you can view. Most graphical web browsers can display PNG or JPEG
 images.
 
 
-### Try:
+## Try:
 
 ```sh
 ./anonymous "ash nazg durhbatuluhk, ash nazg gimbatul, \

2004/arachnid/README.md

@@ -16,7 +16,7 @@ code](#alternate-code) below.
 ```
 
 
-### Try:
+## Try:
 
 ```sh
 ./arachnid arachnid.info

2004/gavare/README.md

@@ -15,7 +15,7 @@ for more details.
 ```
 
 
-### Try:
+## Try:
 
 ```sh
 ./gavare > ioccc_ray.ppm

2004/gavin/README.md

@@ -30,7 +30,7 @@ For more detailed information see [2004 gavin in bugs.md](/bugs.md#2004-gavin).
 ```
 
 
-### Try:
+## Try:
 
 To enjoy the results (on a Linux/x86 machine) with a floppy drive (remember
 those? We do!):

2004/hibachi/README.md

@@ -12,7 +12,7 @@ cd build; ./hibachi-start.sh &
 ```
 
 
-### Try:
+## Try:
 
 ```sh
 cd build; ./hibachi-start.sh &

2004/hoyle/README.md

@@ -12,7 +12,7 @@ make
 ```
 
 
-### Try:
+## Try:
 
 ```sh
 ./hoyle 10 0.5

2004/jdalbec/README.md

@@ -26,7 +26,7 @@ For more detailed information see [2004 jdalbec in bugs.md](/bugs.md#2004-jdalbe
 ```
 
 
-### Try:
+## Try:
 
 ```sh
 ./try.sh

2004/kopczynski/README.md

@@ -15,7 +15,7 @@ will not work with it enabled.
 ```
 
 
-### Try:
+## Try:
 
 ```sh
 ./try

2004/newbern/README.md

@@ -12,7 +12,7 @@ make
 ```
 
 
-### Try:
+## Try:
 
 ```sh
 ./newbern newbern.dat "IOCCC 2004"

2004/omoikane/README.md

@@ -12,7 +12,7 @@ make
 ```
 
 
-### Try:
+## Try:
 
 ```
 ./omoikane omoikane.info omoikane.info omoikane.output

2004/schnitzi/README.md

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

2004/sds/README.md

@@ -23,7 +23,7 @@ For more detailed information see [2004 sds in bugs.md](/bugs.md#2004-sds).
 ```
 
 
-### Try:
+## Try:
 
 ```sh
 ./try.sh

2004/vik1/README.md

@@ -12,7 +12,7 @@ make
 ```
 
 
-### Try:
+## Try:
 
 ```sh
 ./vik1