Minor fixes in 1990/dds/README.md

Format fixes in README.md including making unordered lists to make the
rendered content easier to read and follow.

I've also become aware of a problem with the way the author formatting
was done in recent days in the README.md files that now have to all be
fixed: there needs to be spaces after each line or else the author
information will be one line which is definitely wrong. I think the only
one I got this right is, ironically or not :-), my own entries, namely
because I wanted to make sure that they looked okay (I did 'make sure'
that some of the others did too but that was to changes that I was
unsure of .. ironically leaving out one I should have known but probably
just forgot). Thus many pull requests will be made unless I do it in a
mass fix which I suppose is possible to save time.

1990/dds/README.md

@@ -1,10 +1,10 @@
 # Best Language Tool
 
-	Diomidis Spinellis
+Diomidis Spinellis  
-	Imperial College, University of London
+Imperial College, University of London  
-	Myrsinis 1
+Myrsinis 1  
-	GR-145 62 Kifissia
+GR-145 62 Kifissia  
-	Greece
+Greece  
 
 ## To build:
 
@@ -16,26 +16,28 @@ you Yusuke!
 
 [Cody Boone Ferguson](/winners.html#Cody_Boone_Ferguson) removed the erroneous
 prototype to `fopen()` and made this use `fgets()` instead of `gets()` to make
-it safer and to prevent a potentially alarming warning at linking or runtime.
+it safer and to prevent a potentially alarming warning at compiling and/or
-Thank you Cody for your assistance!
+linking and/or runtime. Thank you Cody for your assistance!
 
 ## To run
 
-	./dds
+```sh
-
+./dds
+```
 
 ## Try:
 
 Give the following lines as input:
-    
+
-	OLD LANDER.BAS
+```
-	RUN
+OLD LANDER.BAS
+RUN
+```
 
 NOTE: this is case sensitive.
 
 ## Judges' comments:
 
-
 Be sure not to run out of fuel!
 
 
@@ -43,40 +45,53 @@ Be sure not to run out of fuel!
 
 This is the DDS-BASIC Interpreter (Version 1.00). 
 
-Immediate commands:
+### Immediate commands:
 
-	RUN	LIST	NEW	OLD filename
+- RUN
-	BYE	SAVE filename
+- LIST
+- NEW
+- OLD filename
+- BYE
+- SAVE filename
 
-Program commands:
+### Program commands:
 
-	variable names a to z		variables initialized to 0 on RUN
+- variable names a to z
-	FOR var = exp TO exp		NEXT variable
+- variables initialized to 0 on RUN
-	GOSUB exp			RETURN
+- FOR var = exp TO exp
-	GOTO exp			IF exp THEN exp
+- NEXT variable
-	INPUT variable			PRINT string
+- GOSUB exp
-	PRINT exp			var = exp
+- RETURN
-	REM any text			END
+- GOTO exp			
+- IF exp THEN exp
+- INPUT variable
+- PRINT string
+- PRINT exp
+- var = exp
+- REM any text
+- END
 
-Expressions (ranked by precedence):
+### Expressions (ranked by precedence):
 
-	Bracketed expressions
+- Bracketed expressions
-	number (leading 0 for octal, 0x for hex, else decimal), variable
+- number (leading 0 for octal, 0x for hex, else decimal), variable
-	Unary -
+- Unary -
-	* / 
+- `*` `/`
-	+ - 
+- `+` `-`
-	= <> 
+- `=` `<>`
-	> < 
+- `>` `<`
-	<= >=
+- `<=` `>=`
-	(* and + are also used for boolean AND and boolean OR)
-	Boolean expressions evaluate to 0 for false and 1 for true
 
-Editing:
+(`*` and `+` are also used for boolean AND and boolean OR)
+
+Boolean expressions evaluate to 0 for false and 1 for true.
+
+### Editing:
 
 - Line editor using line re-entry.
 - A line number with nothing following it, deletes the line.
 
-Input format:
+### Input format:
 
 - Free format positioning of tokens on the line.
 - No space is allowed before the line number.
@@ -85,38 +100,33 @@ Input format:
 - ALL INPUT MUST BE UPPERCASE.
 
 
-Limits:
+### Limits:
 
-	Line numbers		1-10000
+- Line numbers		1-10000
-	Line length		999 characters
+- Line length		999 characters
-	FOR nesting		26
+- FOR nesting		26
-	GOSUB			999 levels
+- GOSUB			999 levels
-	Program			Dynamically allocated
+- Program		Dynamically allocated
-	Expressions		-32768 - 32767 for 16 bit machines, 
+- Expressions		-32768 - 32767 for 16 bit machines, -2147483648 - 2147483647 for 32 bit machines
-				-2147483648 - 2147483647 for 32 bit machines
-
-Error checking / error reports:
 
+### Error checking / error reports:
 
 No error checking is performed.
 It might dump core if a syntax or semantic error is encountered.
 
+### Hosting Environment:
 
-Hosting Environment:
+ANSI C, traditional K&R C or OSF ANDF ASCII or EBCIDIC character set 48K bytes
+memory.
 
-	ANSI C, traditional K&R C or OSF ANDF
+The Speed of DDS-BASIC Interpreter (Version 1.00) relative to Microsoft Advanced
-	ASCII or EBCIDIC character set
+BASIC 3.31 is approximately 60%.
-	48K bytes memory
 
-The Speed of DDS-BASIC Interpreter (Version 1.00). relative to
+The code size could be further reduced by doing ugly things like not declaring
-Microsoft Advanced BASIC 3.31 is Approximately 60%.
+the return type of functions, not freeing memory, #defining define, and joining
-
+lines.  In its present 1536 character form the program is reasonably portable
-The code size could be further reduced by doing ugly things like
+(it may fail to run in a tagged object architecture) and nicely formatted (it
-not declaring the return type of functions, not freeing memory,
+fits in an `80*25` screen).
-#defining define, and joining lines.  In its present 1536 character
-form the program is reasonably portable (it may fail to run in a
-tagged object architecture) and nicely formatted (it fits in an
-80*25 screen).
 
 ## Copyright and CC BY-SA 4.0 License: