Add try.sh and hint.md to 2012/hou + formatting

The hint.md file is necessary as the '#' header in it specifies the
title and stylesheet as part of the entry.

The try.sh script is as usual.

Format/typo check README.md file. The hint.md file formatting was not
changed due to the regexp engine amongst other reasons. Just obvious
spelling errors were updated.

2012/hou/README.md

@@ -15,22 +15,17 @@ make
 ### Try:
 
 ```sh
-less hou.c
-
-./hou ansi.txt hou.c | less -r
-
-./hou chk.txt hou.c | wc
-
-./hou markdown.txt README.md > remarks.htm
+./try.sh
 ```
 
 View the `remarks.htm` file in your web browser.
 
 The result is best viewed in a 80x25 console with ANSI colors.
 
+
 ## Try (Windows):
 
-```sh
+```
 copy header.htm hou.htm /y
 hou html.txt hou.c >> hou.htm
 start hou.htm
@@ -65,6 +60,7 @@ The author does not own the original anime series where the embedded ASCII arts
 come from. For comparison, original non-ASCII art depictions of the relevant
 characters and objects can be found by googling the embedded text messages.
 
+
 ### Syntax files
 
 The syntax file consists of a number of rewriting rules. Each rule consists of a
@@ -81,9 +77,10 @@ The following regular expression operators are supported:
 () [] * + ? | ""
 ```
 
-For example, one can use the following expression to match a certain declaration statement in hou.c:
+For example, one can use the following expression to match a certain declaration
+statement in [hou.c](hou.c):
 
-```
+```re
     "char"[ *]*[a-zA-Z_][0-9a-zA-Z_]*[ ]*((=[0-9a-zA-Z_ ]+)|(\[[0-9a-zA-Z_ ]*\]))?[ ]*(,[ *]*[a-zA-Z_][0-9a-zA-Z_]*[ ]*((=[0-9a-zA-Z_ ]+)|(\[[0-9a-zA-Z_ ]*\]))?[ ]*)*;
 ```
 
@@ -93,10 +90,11 @@ hang for the competing Perl engine while matching itself. Try to compare these
 two engines:
 
 ```sh
-    ./hou ansi.txt ansi.txt
-    perl patho.pl < ansi.txt
+./hou ansi.txt ansi.txt
+perl patho.pl < ansi.txt
 ```
 
+
 ### Limitations
 
 Finally, there are a few limitations...
@@ -108,12 +106,13 @@ Finally, there are a few limitations...
 - Incorrect syntax files are not tolerated.
 - The program relies on ASCII.
 
+
 ### Why obfuscated
 
 The first layer of obfuscation comes from the challenge of embedding a large
 ASCII art in a dense blob. The entire art is composed using only keywords,
 strings and character constants. That results in a number of otherwise useless
-defines and quite a number of unconventionally written constants. While the
+`#define`s and quite a number of unconventionally written constants. While the
 preprocessor may remove the former, the later would remain regardless of
 beautification and preprocessing.
 
@@ -128,6 +127,7 @@ amount of spaghetti branches and virtual thread creations. Finally, the VM in
 As an extra tweak, the text message actually does something useful. Remove the
 "Make a contract with me" catch line and the program would cease to function.
 
+
 ### References
 
 [1][Russ Cox, Regular Expression Matching: the Virtual Machine Approach](http://swtch.com/~rsc/regexp/regexp2.html)