docs: Document strings functions

docs/kiln.1.scd

@@ -266,26 +266,26 @@ Templates have certain data and functions available to them.
 
 All templates have the following functions available to them:
 
-*site*
-	Returns site metadata
+*path.Base* _path_
+	Returns the last element of _path_.
+
+*path.Clean* _path_
+	Returns the shortest path name equivalent to _path_.
+
+*path.Dir* _path_
+	Returns all but the last element of _path_, typically the path's directory.
+
+*path.Ext* _path_
+	Returns the filename extension used by _path_.
+
+*path.Join* _elem..._
+	Joins any number of path elements into a single path.
 
 *reverse* _list_
 	Returns a reversed copy of the provided slice or array.
 
-*path.Base* _path_
-	Returns the last element of path.
-
-*path.Clean* _path_
-	Returns the shortest path name equivalent to path.
-
-*path.Dir* _path_
-	Returns all but the last element of path, typically the path's directory.
-
-*path.Ext* _path_
-	Returns the filename extension used by path.
-
-*path.Join* _elem..._
-	Joins any number of path elements into a single path.
+*safeCSS* _css_
+	Encapsulates known safe CSS content.
 
 *safeHTML* _html_
 	Encapsulates a known safe HTML document fragment.
@@ -293,15 +293,101 @@ All templates have the following functions available to them:
 *safeHTMLAttr* _attr_
 	Encapsulates an HTML attribute from a trusted source.
 
-*safeCSS* _css_
-	Encapsulates known safe CSS content.
-
 *safeJS* _js_
 	Encapsulates a known safe JavaScript expression.
 
 *safeURL* _url_
 	Encapsulates a known safe URL or URL substring.
 
+*site*
+	Returns site metadata (see *SITE METADATA*).
+
+*strings.Count* _string_, _substr_
+	Counts the number of non-overlapping instances of _substr_ in _string_.
+	If _substr_ is an empty string, Count returns 1 + the number of Unicode code
+	points in _string_.
+
+*strings.HasPrefix* _string_, _prefix_
+	Reports whether _string_ begins with _prefix_.
+
+*strings.HasSuffix* _string_, _suffix_
+	Reports whether _string_ ends with _suffix_.
+
+*strings.Join* _elems_, _sep_
+	Concatenates the elements of its first argument to create a single string.
+	The separator string _sep_ is placed between elements in the resulting
+	string.
+
+*strings.Repeat* _string_, _count_
+	Returns a new string consisting of _count_ copies of _string_.
+
+	It panics if _count_ is negative or if the result of
+	(len(_string_) \* _count_) overflows.
+
+*strings.Replace* _string_, _old_, _new_, _n_
+	Returns a copy of _string_ with the first _n_ non-overlapping instances of
+	_old_ replaced by _new_. If _old_ is empty, it matches at the beginning of
+	the string and after each UTF-8 sequence, yielding up to k+1 replacements
+	for a k-rune string. If _n_ < 0, there is no limit on the number of
+	replacements.
+
+*strings.ReplaceAll* _string_, _old_, _new_
+	Returns a copy of _string_ with all non-overlapping instances of _old_
+	replaced by _new_. If _old_ is empty, it matches at the beginning of the
+	string and after each UTF-8 sequence, yielding up to k+1 replacements for a
+	k-rune string.
+
+*strings.Split* _string_, _sep_
+	Slices _string_ into all substrings separated by _sep_ and returns a slice
+	of the substrings between those separators.
+
+	If _string_ does not contain _sep_ and _sep_ is not empty, Split returns a
+	slice of length 1 whose only element is _string_.
+
+	If _sep_ is empty, Split splits after each UTF-8 sequence. If both _string_
+	and _sep_ are empty, Split returns an empty slice.
+
+*strings.Title* _string_
+	Returns a copy of the string with all Unicode letters that begin words
+	mapped to their Unicode title case.
+
+	*BUG:* The rule Title uses for word boundaries does not handle Unicode
+	punctuation properly.
+
+*strings.ToLower* _string_
+	Returns _string_ with all Unicode letters mapped to their lower case.
+
+*strings.ToUpper* _string_
+	Returns _string_ with all Unicode letters mapped to their upper case.
+
+*strings.Trim* _string_, _cutset_
+	Returns a slice of _string_ with all leading and trailing Unicode code
+	points contained in _cutset_ removed.
+
+*strings.TrimLeft* _string_, _cutset_
+	Returns a slice of _string_ with all leading Unicode code points contained
+	in _cutset_ removed.
+
+	To remove a prefix, use *strings.TrimPrefix* instead.
+
+*strings.TrimPrefix* _string_, _prefix_
+	Returns _string_ without the provided leading _prefix_ string. If _string_
+	doesn't start with _prefix_, it is returned unchanged.
+
+*strings.TrimRight* _string_, _cutset_
+	Returns a slice of _string_ with all trailing Unicode code points contained
+	in _cutset_ removed.
+
+	To remove a suffix, use *strings.TrimSuffix* instead.
+
+*strings.TrimSpace* _string_
+	Returns a slice of _string_ with all leading and trailing white space
+	removed, as defined by Unicode.
+
+*strings.TrimSuffix* _string_, _suffix_
+	Returns _string_ without the provided trailing _suffix_ string. If _string_
+	doesn't end with _suffix_, it is returned unchanged.
+
 ## SITE METADATA
 
 Site metadata contains the following data: