[Str] follow spec titlecase refactor

lib/Str.pod

@@ -47,10 +47,41 @@ be useful for any purpose other than comparison.)
 
 (Not implemented in Rakudo and Niecza)
 
-=head2 titlecase
+=head2 tc
 
-    multi sub    titlecase(Str:D  :&filter = &lc, :%exceptions = set()) returns Str
-    multi method titlecase(Str:D: :&filter = &lc, :%exceptions = set()) returns Str
+    multi sub    tc(Str:D ) returns Str:D
+    multi method tc(Str:D:) returns Str:D
+
+Does a Unicode "titlecase" operation, that is changes the first character in
+the string to title case, or to upper case if the character has no title case
+mapping
+
+(Not implemented in Rakudo and Niecza)
+
+=head2 tclc
+
+    multi sub    tclc(Str:D ) returns Str:D
+    multi method tclc(Str:D:) returns Str:D
+
+Turns the first character to title case, and all other characters to lower
+case
+
+(not implemented in Niecza)
+
+=head2 tcuc
+
+    multi sub    tcuc(Str:D ) returns Str:D
+    multi method tcuc(Str:D:) returns Str:D
+
+Turns the first character to title case, and all other characters to upper
+case
+
+(Not implemented in Rakudo and Niecza)
+
+=head2 wordcase
+
+    multi sub    wordcase(Str:D  :&filter = &lc, :%exceptions = set()) returns Str
+    multi method wordcase(Str:D: :&filter = &lc, :%exceptions = set()) returns Str
 
 Performs a Unicode titlecase operation on the first character of
 each word of the string (as defined by a regex C<«> boundary),