Add clarification to insertbefore and insertafter paramaters in lineinfile (#54409)

lib/ansible/modules/files/lineinfile.py

@@ -82,8 +82,9 @@ options:
       - If the first match is required, use(firstmatch=yes).
       - A special value is available; C(EOF) for inserting the line at the end of the file.
       - If specified regular expression has no matches, EOF will be used instead.
+      - If C(insertbefore) is set, default value C(EOF) will be ignored.
       - If regular expressions are passed to both C(regexp) and C(insertafter), C(insertafter) is only honored if no match for C(regexp) is found.
-      - May not be used with C(backrefs).
+      - May not be used with C(backrefs) or C(insertbefore).
     type: str
     choices: [ EOF, '*regex*' ]
     default: EOF
@@ -95,7 +96,7 @@ options:
       - A value is available; C(BOF) for inserting the line at the beginning of the file.
       - If specified regular expression has no matches, the line will be inserted at the end of the file.
       - If regular expressions are passed to both C(regexp) and C(insertbefore), C(insertbefore) is only honored if no match for C(regexp) is found.
-      - May not be used with C(backrefs).
+      - May not be used with C(backrefs) or C(insertafter).
     type: str
     choices: [ BOF, '*regex*' ]
     version_added: "1.1"