fix improper use of whitespace in README.md files

The use of the markdown trailing whitespace to indicate
line break should NOT be done when the following line is empty.

This removes such improper use of whitespace in README.md files.

2018/ferguson/README.md

@@ -3,7 +3,7 @@
 Cody Boone Ferguson <weasel@xexyl.net>   
 [https://ioccc.xexyl.net](https://ioccc.xexyl.net)  
 [https://xexyl.net](https://xexyl.net)  
-Mastodon: [@xexyl@fosstodon.org](https://fosstodon.org/@xexyl)      
+Mastodon: [@xexyl@fosstodon.org](https://fosstodon.org/@xexyl)
 
 ## To build:
 
@@ -288,7 +288,7 @@ isn't insolent enough to say the user is a monkey for certain!*
 Skip to [Obfuscation](#obfuscation).
 
 I noted that there are a number of additional features and here I will document
-some of them. 
+some of them.
 
 ### <a name="keyboards">Keyboards</a>
 
@@ -400,7 +400,7 @@ If you do one of:
  
 It will search for **`MONKEY`** in both cases; in other words it's the last one.
 If the string is too long given the value of **`S`** (see 
-**[How to build](#build)**) it will be truncated. 
+**[How to build](#build)**) it will be truncated.
 
 If you actually do want to search for a string starting with a **`-`** you must
 disable further parsing of options by using the **`-`** option itself; for
@@ -553,7 +553,7 @@ range. Note here that **`rand()`** returns an **`int`** and **`strtol()`**
 returns a **`long`** but I compare the return value of **`rand()`** to the
 mutation rate; if there are any systems where the widths differ this *shouldn't
 matter* because of truncation but I do in any case specifically check for **`R <
-0 || R > 100`**. Either way the invalid range returns the typewriter to Eric. 
+0 || R > 100`**. Either way the invalid range returns the typewriter to Eric.
 
 
 7.  **`test`**
@@ -577,7 +577,7 @@ Generation  109 Offspring 13: TEST
 In this case I also enabled quiet mode but I didn't join the options; the
 **`-r101`** reports that it's out of range and sets monkey mode. I then specify
 the target string and then set a valid mutation rate. This disabled monkey mode
-which means that it'll use the genetic algorithm. 
+which means that it'll use the genetic algorithm.
 
 One more example of monkey mode:
 
@@ -860,7 +860,7 @@ behaviour of the program in a number of ways (see the
 capped to be no greater than **`SIZE_MAX - 1`**. This is handled by the C
 preprocessor.
 
-**`S`**    
+**`S`**
 
 This determines the maximum size of the target string but it **must be at least
 38**; this is because **`38 >= 29`** and because **`strlen("METHINKS IT IS LIKE