Fix pluralization

Author: phipsgabler

src/varinfo.jl

@@ -955,7 +955,7 @@ function _show_varnames(io::IO, vi)
         push!(group, vn)
     end
 
-    print(io, length(groups), " variables (")
+    print(io, length(groups), length(groups) == 1 ? " variable " : " variables ", "(")
     join(io, Iterators.take(keys(groups), _MAX_VARS_SHOWN), ", ")
     length(groups) > _MAX_VARS_SHOWN && print(io, ", ...")
     print(io, "), dimension ", sum(prod(size(md.vals[md.ranges[md.idcs[vn]]])) for vn in vns))
@@ -968,7 +968,7 @@ function Base.show(io::IO, vi::UntypedVarInfo)
     print(io, ")")
 end
 
-# Add a new entry to VarInfo
+
 """
     push!(vi::VarInfo, vn::VarName, r, dist::Distribution)