Changed manual example output due to changes in MTC

Also removed example for `DecodeTree` in MTC that is now meaningless.

lib/tietze.gd

@@ -393,54 +393,7 @@ DeclareGlobalFunction("AddRelator");
 ## <P/>
 ## This time we end up with a shorter presentation.
 ## <P/>
-## As an example of an implicit call of the function
-## <Ref Func="DecodeTree"/> via the command
-## <Ref Func="PresentationSubgroupMtc"/> we handle a subgroup
-## of index 240 in a
-## group of order 40320 given by a presentation due to
-## B.&nbsp;H.&nbsp;Neumann.
-## Note that we increase the level of <Ref InfoClass="InfoFpGroup"/>
-## temporarily to get some additional output.
 ## <P/>
-## <Example><![CDATA[
-## gap> F3 := FreeGroup( "a", "b", "c" );;
-## gap> a := F3.1;; b := F3.2;; c := F3.3;;
-## gap> G := F3 / [ a^3, b^3, c^3, (a*b)^5, (a^-1*b)^5, (a*c)^4,
-## > (a*c^-1)^4, a*b^-1*a*b*c^-1*a*c*a*c^-1, (b*c)^3, (b^-1*c)^4 ];;
-## gap> a := G.1;; b := G.2;; c := G.3;;
-## gap> H := Subgroup( G, [ a, c ] );;
-## gap> SetInfoLevel( InfoFpGroup, 1 );
-## gap> P := PresentationSubgroupMtc( G, H );;
-## #I there are 4 generators and 144 relators of total length 4373
-## #I there are 4 generators and 140 relators of total length 3898
-## #I there are 4 generators and 137 relators of total length 3715
-## #I there are 4 generators and 135 relators of total length 3380
-## #I there are 4 generators and 134 relators of total length 3291
-## #I there are 4 generators and 133 relators of total length 3212
-## #I there are 3 generators and 129 relators of total length 6494
-## #I there are 3 generators and 128 relators of total length 5465
-## #I there are 3 generators and 127 relators of total length 3722
-## #I there are 3 generators and 126 relators of total length 3048
-## #I there are 2 generators and 10 relators of total length 118
-## #I there are 2 generators and 5 relators of total length 38
-## gap> TzGoGo( P );
-## gap> TzPrintGenerators( P );
-## #I 1. _x1 19 occurrences
-## #I 2. _x2 19 occurrences
-## gap> TzPrint( P );
-## #I generators: [ _x1, _x2 ]
-## #I relators:
-## #I 1. 3 [ 1, 1, 1 ]
-## #I 2. 3 [ 2, 2, 2 ]
-## #I 3. 8 [ 1, -2, 1, -2, 1, -2, 1, -2 ]
-## #I 4. 8 [ 2, 1, 2, 1, 2, 1, 2, 1 ]
-## #I 5. 16 [ 2, -1, 2, 1, 2, -1, 2, 1, 2, -1, 2, 1, 2, -1, 2, 1 ]
-## gap> K := FpGroupPresentation( P );
-## <fp group on the generators [ _x1, _x2 ]>
-## gap> SetInfoLevel( InfoFpGroup, 0 );
-## gap> Size( K );
-## 168
-## ]]></Example>
 ## </Description>
 ## </ManSection>
 ## <#/GAPDoc>
@@ -1603,7 +1556,7 @@ DeclareAttribute("TzOptions",IsPresentation,"mutable");
 ## <A>P</A>.
 ## <Example><![CDATA[
 ## gap> TzPrintOptions( P );
-## #I protected = 2
+## #I protected = 0
 ## #I eliminationsLimit = 100
 ## #I expandLimit = 150
 ## #I generatorsLimit = 0