Updated WHILETEST and Shell Dev doc to use the newly discovered ![] (NOT Exp) logic. Put examples of usage in doc.

.Docs/Shell Developers Guide.md

@@ -52,6 +52,35 @@ IFTTT Tweet using HTTPGET
 where [ exp ] and [ condition ] allow to detail operators....
 
 
+anywhere you can have [ exp ] you can have ![ exp ] which means NOT exp.
+
+
+    while ![ $total -eq 0 ]
+    loop
+    
+is the same thing as 
+
+    while [ $total -ne 0 ]
+    loop
+
+Just like
+
+    IF [ A -GT 5 ]
+      DO X
+    ELSE
+      DO Y
+    FI
+
+is the same as
+
+    IF ![ A -LE 5 ]
+      DO Y
+    ELSE
+      DO X
+    FI
+
+Notice that the DO X and DO Y logic is swapped between the two cases.
+
 ## Internal Shell commands:
 
 | Name      | Status  | Comment |
@@ -73,7 +102,7 @@ where [ exp ] and [ condition ] allow to detail operators....
 | EXIT      | Working | exit function, script or shell |
 | FI        | Working | Terminator for IF block |
 | FUNC      | In Progress | FUNC fonction_name <br>   \<body\> <br>   END |
-| IF        | Working | [ \<condition\> ] |
+| IF        | Working | [ \<condition\> ] <br> ![ \<condition\> ]|
 | LOOP      | Working | Terminator for WHILE block |
 | MD        | Working | MD path or relative path <br> Create a directory |
 | NOHUP     | Working | Start a process with PPID=PS0 (Daemon) |

TESTS/WHILETEST.txt

@@ -59,9 +59,12 @@ ELSE
     ECHO "WHILE LOOP Test 2 Failed" >> ${Log}
   FI
 FI
+#
+#  This next tests uses the NOT variant of the condition block
+#
 set counter = 0
 set total = 2000
-while [ $total -ne 0 ]
+while ![ $total -eq 0 ]
   set total = $total - 100
   set counter = $counter + 1
   ECHO -N "\e[18;10HTest 3 - Counter : ${count}   Total : ${total}  "