[3.11] GH-98906 re module: search() vs. match() section should mention fullmatch() (GH-98916) (GH-99912)

GH-98906 ```re``` module: ```search() vs. match()``` section should mention ```fullmatch()``` (GH-98916) Mention fullmatch along with search and match. (cherry picked from commit e0f91de) Co-authored-by: ram vikram singh <ramvikrams243@gmail.com> Co-authored-by: ram vikram singh <ramvikrams243@gmail.com>

Author: miss-islington

Doc/library/re.rst

@@ -1562,16 +1562,22 @@ search() vs. match()
 
 .. sectionauthor:: Fred L. Drake, Jr. <fdrake@acm.org>
 
-Python offers two different primitive operations based on regular expressions:
-:func:`re.match` checks for a match only at the beginning of the string, while
-:func:`re.search` checks for a match anywhere in the string (this is what Perl
-does by default).
+Python offers different primitive operations based on regular expressions:
+
++ :func:`re.match` checks for a match only at the beginning of the string
++ :func:`re.search` checks for a match anywhere in the string
+ (this is what Perl does by default)
++ :func:`re.fullmatch` checks for entire string to be a match
+
 
 For example::
 
  >>> re.match("c", "abcdef") # No match
  >>> re.search("c", "abcdef") # Match
  <re.Match object; span=(2, 3), match='c'>
+ >>> re.fullmatch("p.*n", "python") # Match
+ <re.Match object; span=(0, 6), match='python'>
+ >>> re.fullmatch("r.*n", "python") # No match
 
 Regular expressions beginning with ``'^'`` can be used with :func:`search` to
 restrict the match at the beginning of the string::
@@ -1585,8 +1591,8 @@ Note however that in :const:`MULTILINE` mode :func:`match` only matches at the
 beginning of the string, whereas using :func:`search` with a regular expression
 beginning with ``'^'`` will match at the beginning of each line. ::
 
- >>> re.match('X', 'A\nB\nX', re.MULTILINE) # No match
- >>> re.search('^X', 'A\nB\nX', re.MULTILINE) # Match
+ >>> re.match("X", "A\nB\nX", re.MULTILINE) # No match
+ >>> re.search("^X", "A\nB\nX", re.MULTILINE) # Match
  <re.Match object; span=(4, 5), match='X'>