Centralize import/export statements and clean up main file (#1537)

docs/src/perm.md

@@ -21,7 +21,7 @@ In practice this may result in decreased memory footprint (when storing multiple
 All the permutation group types belong to the `Group` abstract type and the corresponding permutation element types belong to the `GroupElem` abstract type.
 
 ```@docs
-Generic.setpermstyle
+setpermstyle
 ```
 
 ## Permutations constructors
@@ -231,7 +231,7 @@ Each of the methods perform basic sanity checks on the input which can be switch
 ## Misc
 ```@docs
 rand(::Generic.SymmetricGroup)
-Generic.matrix_repr(::Perm)
+matrix_repr(::Perm)
 Generic.emb(::Generic.SymmetricGroup, ::Vector{Int}, ::Bool)
 Generic.emb!(::Perm, ::Perm, V)
 ```

docs/src/ytabs.md

@@ -166,8 +166,8 @@ character(::Type{Int}, lambda::Partition, mu::Partition[, check::Bool=true])
 The dimension $\dim \lambda$ of the irreducible module corresponding to partition $\lambda$ can be computed using [Hook length formula](https://en.wikipedia.org/wiki/Hook_length_formula)
 
 ```@docs
-Generic.rowlength
-Generic.collength
+rowlength
+collength
 hooklength
 dim(::Generic.YoungTableau)
 ```
@@ -208,7 +208,7 @@ The implementation follows
 implementing the following functions. For precise definitions and meaning please consult the paper cited.
 
 ```@docs
-Generic.partitionseq
+partitionseq
 is_rimhook(::BitVector, ::Int, ::Int)
 Generic.MN1inner
 ```