removed all unneeded error blocks from documentation

src/org/rascalmpl/library/Exception.rsc

@@ -27,7 +27,7 @@ are generated by a throw statement. They can all be caught with a try-catch usin
 @examples{
 
 Import relevant libraries:
-```rascal-shell,continue,error
+```rascal-shell,continue
 import Exception;
 import IO;
 ```
@@ -37,7 +37,7 @@ weekend = ("saturday": 1, "sunday": 2);
 weekend["monday"];
 ```
 Repeat this, but catch the exception. We use variable `N` to track what happened:
-```rascal-shell,continue,error
+```rascal-shell,continue
 N = 1;
 try {
    N = weekend["monday"];

src/org/rascalmpl/library/IO.rsc

@@ -340,11 +340,11 @@ List the entries in directory `file`.
 
 #### Examples
 
-```rascal-shell,error
+```rascal-shell
 import IO;
 ```
 List all entries in the standard library:
-```rascal-shell,continue,error
+```rascal-shell,continue
 listEntries(|std:///|);
 ```
 }

src/org/rascalmpl/library/List.rsc

@@ -168,11 +168,11 @@ Get the first element(s) from a list.
 
 #### Examples
 
-```rascal-shell,error
+```rascal-shell
 import List;
 ```
 Get the first element:
-```rascal-shell,continue,error
+```rascal-shell,continue
 head([1, 2, 3]);
 head(["zebra", "elephant", "snake", "owl"]);
 ```
@@ -181,7 +181,7 @@ An exception is thrown when taking the head of an empty list:
 head([]);
 ```
 Get the first n elements:
-```rascal-shell,continue,error
+```rascal-shell,continue
 head([1, 2, 3, 4], 2);
 head(["zebra", "elephant", "snake", "owl"], 2);
 ```
@@ -279,7 +279,7 @@ Returns a new list with the value of `elm` inserted at index position `n` of the
 
 #### Examples
 
-```rascal-shell,error
+```rascal-shell
 import List;
 insertAt([1,2,3], 1, 5);
 insertAt(["zebra", "elephant", "snake", "owl"], 2, "eagle");
@@ -819,10 +819,8 @@ Get the tail element(s) from a list.
 
 #### Examples
 
-```rascal-shell,error
-```
 All but first element:
-```rascal-shell,continue,error
+```rascal-shell,continue
 import List;
 tail([10,20,30]);
 ```
@@ -831,7 +829,7 @@ Try an error case:
 tail([]);
 ```
 Last n elements:
-```rascal-shell,continue,error
+```rascal-shell,continue
 tail([10, 20, 30, 40, 50, 60], 3);
 ```
 Try an error case:
@@ -950,7 +948,7 @@ Convert a list of tuples to a map; result must be a map.
 
 #### Examples
 
-```rascal-shell,error
+```rascal-shell
 import List;
 toMapUnique([<1,10>, <2, 20>, <3, 30>]);
 ```

src/org/rascalmpl/library/Map.rsc

@@ -156,7 +156,7 @@ Also see ((Map-invert)) and ((module:Exception)).
 
 #### Examples
 
-```rascal-shell,error
+```rascal-shell
 import Map;
 invertUnique(("apple": 1, "pear": 2, "orange": 3));
 ```

src/org/rascalmpl/library/Set.rsc

@@ -443,7 +443,7 @@ Convert a set of tuples to a map. The result should be a legal map (i.e., withou
 
 #### Examples
 
-```rascal-shell,error
+```rascal-shell
 import Set;
 toMapUnique({<"a", 1>, <"b", 2>, <"c", 10>});
 ```

src/org/rascalmpl/library/String.rsc

@@ -559,7 +559,7 @@ Throws `IllegalArgument` when `s` cannot be converted.
 
 #### Examples
 
-```rascal-shell,error
+```rascal-shell
 import String;
 toInt("11");
 toInt("11", 8);