Add colon to 'To run' lines

Or else add an ostomy :-).

Some README.md files have severe ulcerative colitis and will need a
colectomies but others are missing colons. These will be discovered and
fixed in time. In the meantime I've restored some functionality for
these poor README.md files by giving them an ostomy.

1996/gandalf/README.md

@@ -1,14 +1,13 @@
 # Best Layout
 
-    Dean Swift
-    Trinome Communications
-    7, Jeffries Passage
-    Guildford
-    Surrey
-    GU1 4AP
-    England
-
-    http://www.tc3.co.uk/~gandalf/G.HTML
+Dean Swift
+Trinome Communications
+7, Jeffries Passage
+Guildford
+Surrey
+GU1 4AP
+England
+http://www.tc3.co.uk/~gandalf/G.HTML
 
 ## To build:
 
@@ -19,7 +18,7 @@ and work with modern systems. As he loved the references in the code that could
 not compile he just commented out as little as possible to get this to compile.
 Thank you Cody for your assistance!
 
-## To run
+## To run:
 
 	./gandalf
 

1998/banks/README.md

@@ -12,7 +12,7 @@
 
         make all
 
-## To run
+## To run:
 
 	cat horizon.sc pittsburgh.sc | ./banks
 

1998/bas1/README.md

@@ -10,7 +10,7 @@
 
         make all
 
-## To run
+## To run:
 
 If lpr on your system can print PostScript:
 

1998/dlowe/README.md

@@ -12,7 +12,7 @@
 
         make all
 
-## To run
+## To run:
 
 	./dlowe < anyfile > pootfile
 

1998/dloweneil/README.md

@@ -12,7 +12,7 @@
 
         make all
 
-## To run
+## To run:
 
 	./pootris
 

1998/fanf/README.md

@@ -16,7 +16,7 @@
 NOTE: This may take a while.  Some systems may have problems building 
 this entry because of the system resources it requires.
 
-## To run
+## To run:
 
 	./fanf
 

1998/tomtorfs/README.md

@@ -12,7 +12,7 @@
 
         make all
 
-## To run
+## To run:
 
 	./tomtorfs tomtorfs.c 32 04C11DB7 1 FFFFFFFF FFFFFFFF
 

2012/tromp/README.md

@@ -10,7 +10,7 @@ John Tromp
 
     make tromp32	# On a 32-bit machine
 
-## To run
+## To run:
 
     ./tromp [-b]