some link fixes

docs/designers/language-builtin-functions.md

@@ -2,7 +2,7 @@ Built-in Functions {#language.builtin.functions}
 ==================
 
 ## Table of contents
-- [{$var=...}](./language-builtin-functions.md)
+- [{$var=...}](./language-builtin-functions/language-function-shortform-assign.md)
 - [{append}](./language-builtin-functions/language-function-append.md)
 - [{assign}](./language-builtin-functions/language-function-assign.md)
 - [{block}](./language-builtin-functions/language-function-block.md)

docs/designers/language-custom-functions.md

@@ -6,16 +6,16 @@ the templates.
 
 ## Table of contents
 - [{counter}](./language-custom-functions/language-function-counter.md)
-- [{cycle}](./language-custom-functions/language.function.cycle.md)
-- [{eval}](./language-custom-functions/language.function.eval.md)
-- [{fetch}](./language-custom-functions/language.function.fetch.md)
-- [{html_checkboxes}](./language-custom-functions/language.function.html.checkboxes.md)
-- [{html_image}](./language-custom-functions/language.function.html.image.md)
-- [{html_options}](./language-custom-functions/language.function.html.options.md)
-- [{html_radios}](./language-custom-functions/language.function.html.radios.md)
-- [{html_select_date}](./language-custom-functions/language.function.html.select.date.md)
-- [{html_select_time}](./language-custom-functions/language.function.html.select.time.md)
-- [{html_table}](./language-custom-functions/language.function.html.table.md)
-- [{mailto}](./language-custom-functions/language.function.mailto.md)
-- [{math}](./language-custom-functions/language.function.math.md)
-- [{textformat}](./language-custom-functions/language.function.textformat.md)
+- [{cycle}](./language-custom-functions/language-function-cycle.md)
+- [{eval}](./language-custom-functions/language-function-eval.md)
+- [{fetch}](./language-custom-functions/language-function-fetch.md)
+- [{html_checkboxes}](./language-custom-functions/language-function-html-checkboxes.md)
+- [{html_image}](./language-custom-functions/language-function-html-image.md)
+- [{html_options}](./language-custom-functions/language-function-html-options.md)
+- [{html_radios}](./language-custom-functions/language-function-html-radios.md)
+- [{html_select_date}](./language-custom-functions/language-function-html-select-date.md)
+- [{html_select_time}](./language-custom-functions/language-function-html-select-time.md)
+- [{html_table}](./language-custom-functions/language-function-html-table.md)
+- [{mailto}](./language-custom-functions/language-function-mailto.md)
+- [{math}](./language-custom-functions/language-function-math.md)
+- [{textformat}](./language-custom-functions/language-function-textformat.md)

docs/designers/language-modifiers.md

@@ -2,30 +2,30 @@ Variable Modifiers {#language.modifiers}
 ==================
 
 ## Table of contents
-- [capitalize](./language-modifiers/language.modifiers.md)
-- [cat](./language-modifiers/language.modifier.md)
-- [count_characters](./language-modifiers/language.modifier.md)
-- [count_paragraphs](./language-modifiers/language.modifier.md)
-- [count_sentences](./language-modifiers/language.modifier.md)
-- [count_words](./language-modifiers/language.modifier.md)
-- [date_format](./language-modifiers/language.modifier.md)
-- [default](./language-modifiers/language.modifier.md)
-- [escape](./language-modifiers/language.modifier.md)
-- [from_charset](./language-modifiers/language.modifier.md)
-- [indent](./language-modifiers/language.modifier.md)
-- [lower](./language-modifiers/language.modifier.md)
-- [nl2br](./language-modifiers/language.modifier.md)
-- [regex_replace](./language-modifiers/language.modifier.md)
-- [replace](./language-modifiers/language.modifier.md)
-- [spacify](./language-modifiers/language.modifier.md)
-- [string_format](./language-modifiers/language.modifier.md)
-- [strip](./language-modifiers/language.modifier.md)
-- [strip_tags](./language-modifiers/language.modifier.md)
-- [to_charset](./language-modifiers/language.modifier.md)
-- [truncate](./language-modifiers/language.modifier.md)
-- [unescape](./language-modifiers/language.modifier.md)
-- [upper](./language-modifiers/language.modifier.md)
-- [wordwrap](./language-modifiers/language.modifier.md)
+- [capitalize](./language-modifiers/language-modifier-capitalize.md)
+- [cat](./language-modifiers/language-modifier-cat.md)
+- [count_characters](./language-modifiers/language-modifier-count-characters.md)
+- [count_paragraphs](./language-modifiers/language-modifier-count-paragraphs.md)
+- [count_sentences](./language-modifiers/language-modifier-count-sentences.md)
+- [count_words](./language-modifiers/language-modifier-count-words.md)
+- [date_format](./language-modifiers/language-modifier-date-format.md)
+- [default](./language-modifiers/language-modifier-default.md)
+- [escape](./language-modifiers/language-modifier-escape.md)
+- [from_charset](./language-modifiers/language-modifier-from-charset.md)
+- [indent](./language-modifiers/language-modifier-indent.md)
+- [lower](./language-modifiers/language-modifier-lower.md)
+- [nl2br](./language-modifiers/language-modifier-nl2br.md)
+- [regex_replace](./language-modifiers/language-modifier-regex-replace.md)
+- [replace](./language-modifiers/language-modifier-replace.md)
+- [spacify](./language-modifiers/language-modifier-spacify.md)
+- [string_format](./language-modifiers/language-modifier-string-format.md)
+- [strip](./language-modifiers/language-modifier-strip.md)
+- [strip_tags](./language-modifiers/language-modifier-strip-tags.md)
+- [to_charset](./language-modifiers/language-modifier-to-charset.md)
+- [truncate](./language-modifiers/language-modifier-truncate.md)
+- [unescape](./language-modifiers/language-modifier-unescape.md)
+- [upper](./language-modifiers/language-modifier-upper.md)
+- [wordwrap](./language-modifiers/language-modifier-wordwrap.md)
 
 Variable modifiers can be applied to
 [variables](./language-variables.md), [custom