doc/stdlib: add {,l,r}strip, {upp,low}ercase, {begin,end}s_with

doc/helpdb.jl

@@ -574,6 +574,48 @@ collection[key...] = value
 
 "),
 
+(E"Strings",E"strip",E"strip(string)
+
+   Return 'string' with any leading and trailing whitespace removed.
+
+"),
+
+(E"Strings",E"lstrip",E"lstrip(string)
+
+   Return 'string' with any leading whitespace removed.
+
+"),
+
+(E"Strings",E"rstrip",E"rstrip(string)
+
+   Return 'string' with any trailing whitespace removed.
+
+"),
+
+(E"Strings",E"begins_with",E"begins_with(string, prefix)
+
+   Returns 'true' if 'string' starts with 'prefix'.
+
+"),
+
+(E"Strings",E"ends_with",E"ends_with(string, suffix)
+
+   Returns 'true' if 'string' ends with 'suffix'.
+
+"),
+
+(E"Strings",E"uppercase",E"uppercase(string)
+
+   Returns 'string' with all characters converted to uppercase.
+
+"),
+
+(E"Strings",E"lowercase",E"lowercase(string)
+
+   Returns 'string' with all characters converted to lowercase.
+
+"),
+
 (E"Strings",E"join",E"join(strings, delim)
 
    Join an array of strings into a single string, inserting the given

doc/stdlib/base.rst

@@ -417,6 +417,34 @@ Strings
 
    Return an array of strings by splitting the given string on occurrences of the given character delimiter. The second argument may also be a set of character delimiters to use. The third argument specifies whether empty fields should be included.
 
+.. function:: strip(string)
+
+   Return ``string`` with any leading and trailing whitespace removed.
+
+.. function:: lstrip(string)
+
+   Return ``string`` with any leading whitespace removed.
+
+.. function:: rstrip(string)
+
+   Return ``string`` with any trailing whitespace removed.
+
+.. function:: begins_with(string, prefix)
+
+   Returns ``true`` if ``string`` starts with ``prefix``.
+
+.. function:: ends_with(string, suffix)
+
+   Returns ``true`` if ``string`` ends with ``suffix``.
+
+.. function:: uppercase(string)
+
+   Returns ``string`` with all characters converted to uppercase.
+
+.. function:: lowercase(string)
+
+   Returns ``string`` with all characters converted to lowercase.
+
 .. function:: join(strings, delim)
 
    Join an array of strings into a single string, inserting the given delimiter between adjacent strings.