fix docs

docs/src/dataset.md

@@ -19,7 +19,7 @@ close
 path
 ncgen
 varbyattrib
-write(::AbstractString, ::NCDataset)
+write
 ```
 
 Notice that DateTime-structures from [CFTime](http://juliageo.org/CFTime.jl/stable/) are used to represent time for non-standard calendars.

src/dataset.jl

@@ -469,6 +469,7 @@ The keywords `include` and `exclude` configure which variable of `src` should be
 (by default all), or which should be `excluded` (by default none).
 
 If the first argument is a file name, then the dataset is open in create mode (`c`).
+
 This function is useful when you want to save the dataset from a multi-file dataset.
 """
 function Base.write(dest::NCDataset, src::AbstractDataset;