Fix Unicode NAMESPACE_SEPARATOR and subscripts in latex output

src/latexify_recipes.jl

@@ -52,6 +52,8 @@ recipe(n) = latexify_derivatives(cleanup_exprs(_toexpr(n)))
     cdot --> false
     fmt --> FancyNumberFormatter(5)
     index --> :subscript
+    snakecase --> true
+    safescripts --> true
 
     return recipe(n)
 end
@@ -189,7 +191,10 @@ function _toexpr(O)
             return frac_expr
         end
     end
-    issym(O) && return nameof(O)
+    if issym(O) 
+        sym = string(nameof(O))
+        return Symbol(replace(sym, NAMESPACE_SEPARATOR => "."))
+    end
     !iscall(O) && return O
 
     op = operation(O)

src/rewrite-helpers.jl

@@ -34,7 +34,7 @@ end
 
 """
     hasnode(c, x)
-Returns true if any part of `x` fufills the condition given in c. c can be a function or an expression.
+Returns true if any part of `x` fulfills the condition given in c. c can be a function or an expression.
 If it is a function, returns true if x is true for any part of x. If c is an expression, returns
 true if x contains c.
 
@@ -76,7 +76,7 @@ end
 
 """
 filterchildren(c, x)
-Returns all parts of `x` that fufills the condition given in c. c can be a function or an expression.
+Returns all parts of `x` that fulfills the condition given in c. c can be a function or an expression.
 If it is a function, returns everything for which the function is `true`. If c is an expression, returns
 all expressions that matches it.