Fixes in 1995 winning entries' README.md files

...minus the ones that were fixed in earlier commits for specific
reasons.

Besides formatting and typo fixes I think the only thing noteworthy is
that 1995/spinellis was missing the URL which has been added now.

1995/savastio/README.md

@@ -1,23 +1,29 @@
 # Most Obfuscated Syntax
 
-    Michael Savastio
-    Securicor Telesciences
-    925 1/2 Anchor St, Apt 2
-    Philadelphia, PA  19124
-    USA
+Michael Savastio  
+Securicor Telesciences  
+925 1/2 Anchor St, Apt 2  
+Philadelphia, PA  19124  
+USA  
 
 ## To build:
 
-        make all
+```sh
+make all
+```
 
 ## To run:
 
-	./savastio
-	# enter a number such as 100
+```sh
+./savastio
+# enter a number such as 100
+```
 
 ## Try:
 
-	echo 42 | ./savastio
+```sh
+echo 42 | ./savastio
+```
 
 ## Judges' remarks:
 
@@ -36,14 +42,15 @@ Aside from having an artistic code layout and confusing variable names,
 the algorithm itself takes advantage of some cute C-isms.  Try to
 figure out how it prints the prompt "Enter number:".
 
-Numbers are represented internally by a linked list of blocks each
+Numbers are represented internally by a [linked
+list](https://en.wikipedia.org/wiki/Linked_list) of blocks each
 containing 1000 buckets of 4-digit integers.  To further confuse
 matters, the buckets are arranged backwards in the block.  For example,
 the number 8347108947139478934713847134 is represented as:
 
        7134 1384 9347 3947 9471 7108 834
 
-Platform limitations:
+### Platform limitations
 
 Long integers must be at least 4 bytes.