Update all modules documentation.

MODULES.md

@@ -321,6 +321,14 @@ splits it into multiple lines on word boundaries to wrap it
 nicely. The resulting string is free of ANSI CSI SGR sequences and may
 contain newline characters.
 
+    (ansi-string . args)
+
+* ```args``` - a list of strings and/or ANSI keywords
+
+Returns a string created by appending all the strings given and
+```ansi``` function produced ones with consecutive keywords passed to
+single ```ansi``` evaluation.
+
 ### Command Line parsing
 
 Generic syntax-based implementation of command-line options parsing
@@ -613,6 +621,14 @@ predicate.
 Returns a string created by repeating the string ```str``` exactly
 ```rep``` number of times.
 
+    (string-first+rest str)
+
+* ```str``` - a string to split
+
+Returns a pair of strings where the ```car``` of the pair is the first
+token in the ```str``` given and ```cdr``` is a string with the
+remainder with leading whitespace removed.
+
 ### Table
 
 This module provides moderately complex terminal table rendering.