add a few breadcrumbs to mspacegroup in docs

Author: thchr

docs/src/groups.md

@@ -1,6 +1,6 @@
 # Groups
 All groups in Crystalline are concrete instances of the abstract supertype [`Crystalline.AbstractGroup{D}`](@ref), referring to a group in `D` dimensions. `Crystalline.AbstractGroup{D}` is itself a subtype of `AbstractVector{SymOperation{D}}`.
-Crystalline currently supports five group types: [`SpaceGroup`](@ref), [`PointGroup`](@ref), [`LittleGroup`](@ref), [`SubperiodicGroup`](@ref) and [`SiteGroup`](@ref).
+Crystalline currently supports five group types: [`SpaceGroup`](@ref), [`PointGroup`](@ref), [`LittleGroup`](@ref), [`SubperiodicGroup`](@ref), [`SiteGroup`](@ref), and [`MSpaceGroup`](@ref).
 
 ## Example: space groups
 
@@ -40,4 +40,7 @@ ops = generators(sgnum, SpaceGroup{D})
 To generate a group from a list of generators, we can use the [`generate`](@ref) method. As an example, we can verify that `ops` in fact returns symmetry operations identical to those in `sg`:
 ```@example spacegroup
 generate(ops)
-```
+```
+
+## Magnetic space groups
+Magnetic space groups are accessible via [`mspacegroup`](@ref).

src/magnetic/types.jl

@@ -1,4 +1,7 @@
 # --- MSymOperation ---
+"""
+$(TYPEDEF)$(TYPEDFIELDS)
+"""
 struct MSymOperation{D} <: AbstractOperation{D}
     op :: SymOperation{D}
     tr :: Bool
@@ -33,6 +36,9 @@ end
 # The `num` field of `MSpaceGroup` gives the the two BNS numbers:
 #   - `num[1]`: F space-group associated number
 #   - `num[2]`: crystal-system sequential number
+"""
+$(TYPEDEF)$(TYPEDFIELDS)
+"""
 struct MSpaceGroup{D} <: AbstractGroup{D, MSymOperation{D}}
     num :: Tuple{Int, Int}
     operations :: Vector{MSymOperation{D}}