diff --git a/pretty.lua b/pretty.lua
index eb67fa8..3eef64c 100644
--- a/pretty.lua
+++ b/pretty.lua
@@ -301,25 +301,25 @@ local format_value
 
 -- Ways to format keys
 
-local function format_key_and_value_string_map (l, key, value, options, depth)
+local function format_key_and_value_string_map (l, key, value, _, depth)
     l[#l+1] = key
     l[#l+1] = { 'align', 'key', #key }
     l[#l+1] = ' = '
-    return format_value(value, options, depth, l)
+    return format_value(value, nil, depth, l)
 end
 
-local function format_key_and_value_arbitr_map (l, key, value, options, depth)
+local function format_key_and_value_arbitr_map (l, key, value, _, depth)
     local index_before_key = #l+1
     l[#l+1] = '['
-    format_value(key, options, math.huge, l)
+    format_value(key, nil, math.huge, l)
     l[#l+1] = ']'
     l[#l+1] = { 'align', 'key', width_of_strings_in_l(l, index_before_key) }
     l[#l+1] = ' = '
-    return format_value(value, options, depth, l)
+    return format_value(value, nil, depth, l)
 end
 
-local function format_key_and_value_sequence (l, key, value, options, depth)
-    return format_value(value, options, depth, l)
+local function format_key_and_value_sequence (l, key, value, _, depth)
+    return format_value(value, nil, depth, l)
 end
 
 local TABLE_TYPE_TO_PAIR_FORMAT = {
@@ -333,18 +333,18 @@ local TABLE_TYPE_TO_PAIR_FORMAT = {
 
 -- Formatting tables
 
-function format_table (t, options, depth, l)
+function format_table (t, _, depth, l)
     -- Error Checking
     -- TODO: Add more nuanced formatting.
 
     assert(type(t) == 'table')
-    assert(type(options) == 'table' and type(depth) == 'number' and type(l) == 'table')
+    assert(type(depth) == 'number' and type(l) == 'table')
 
     -- Do stuff
 
     local table_info  =  l.info[t] or get_table_info(t)
 
-    if options.recursion == 'marked' and table_info.marker then
+    if l.options.recursion == 'marked' and table_info.marker then
         l[#l+1], l[#l+2], l[#l+3] = '<', table_info.marker, '>'
     end
 
@@ -354,7 +354,7 @@ function format_table (t, options, depth, l)
     if table_info.type == TABLE_TYPE.EMPTY then
         -- Empty Map
         return l '{}'
-    elseif depth >= options.max_depth or already_visited then
+    elseif depth >= l.options.max_depth or already_visited then
         -- Already visited or above max depth
         return l '{...}'
     end
@@ -373,7 +373,7 @@ function format_table (t, options, depth, l)
     -- Begin formatting table.
     l[#l+1] = {'indent', '{'}
     for _, pair in ipairs(key_value_pairs) do
-        pair_format_func(l, pair[1], pair[2], options, depth + 1)
+        pair_format_func(l, pair[1], pair[2], nil, depth + 1)
         l[#l+1] = ','
         l[#l+1] = {'seperator'}
     end
@@ -394,12 +394,12 @@ end
 
 -- Formatting Strings
 
-local function format_string (str, options, depth, l)
+local function format_string (str, _, depth, l)
     -- TODO: Add option for escaping unicode characters.
 
     -- Error checking
     assert( type(str) == 'string' )
-    assert(type(options) == 'table' and type(depth) == 'number' and type(l) == 'table')
+    assert(type(depth) == 'number' and type(l) == 'table')
 
     -- Do work
 
@@ -410,8 +410,8 @@ local function format_string (str, options, depth, l)
 
     -- ...
     local chance_of_longform     =  is_long_string and ((newline_or_tab_index or math.huge) <= NR_CHARS_IN_LONG_STRING) or double_quote_index and single_quote_index
-    local cut_string_index       =  options.cut_strings and (is_long_string or chance_of_longform)
-                                                        and math.min(NR_CHARS_IN_LONG_STRING - 3, newline_or_tab_index or 1/0, double_quote_index or 1/0, single_quote_index or 1/0)
+    local cut_string_index       =  l.options.cut_strings and (is_long_string or chance_of_longform)
+                                                          and math.min(NR_CHARS_IN_LONG_STRING - 3, newline_or_tab_index or 1/0, double_quote_index or 1/0, single_quote_index or 1/0)
 
     local longform   = chance_of_longform and ((not cut_string_index) or cut_string_index < math.min(newline_or_tab_index or 1/0, double_quote_index or 1/0, single_quote_index or 1/0))
 
@@ -440,13 +440,13 @@ local function format_string (str, options, depth, l)
     l[#l+1] = right
 end
 
-local function format_coroutine (value, options, depth, l)
+local function format_coroutine (value, _, depth, l)
     l[#l+1] = coroutine.status(value)
     l[#l+1] = ' coroutine: '
     l[#l+1] = tostring(value):sub(9)
 end
 
-local function format_primitive (value, options, depth, l)
+local function format_primitive (value, _, depth, l)
     l[#l+1] = tostring(value)
 end
 
@@ -464,9 +464,11 @@ local TYPE_TO_FORMAT_FUNC = {
 }
 
 function format_value (value, _, depth, l)
+    assert(type(depth) == 'number' and type(l) == 'table')
+    if _ ~= nil then  print('Ugh: ' .. tostring(_))  end
     local formatting = TYPE_TO_FORMAT_FUNC[type(value)]
     if formatting then
-        formatting(value, l.options, depth, l, format_value)
+        formatting(value, nil, depth, l, format_value)
     else
         error(ERROR_UNKNOWN_TYPE:format(type(value), tostring(value)), 2)
     end