Documentation update.

doc/html/pcre2pattern.html

@@ -3517,6 +3517,11 @@ next attempt at "c". Note that a possessive quantifer does not have the same
 effect as this example; although it would suppress backtracking during the
 first match attempt, the second attempt would start at the second character
 instead of skipping on to "c".
+</P>
+<P>
+If (*SKIP) is used inside a lookbehind to specify a new starting point that is
+not later than the starting point of the current match, it is ignored, and the
+normal "bumpalong" occurs.
 <pre>
   (*SKIP:NAME)
 </pre>

doc/pcre2.txt

@@ -9219,6 +9219,10 @@ BACKTRACKING CONTROL
        attempt would start at the second character instead of skipping  on  to
        "c".
 
+       If  (*SKIP) is used inside a lookbehind to specify a new starting point
+       that is not later than the starting point of the current match,  it  is
+       ignored, and the normal "bumpalong" occurs.
+
          (*SKIP:NAME)
 
        When  (*SKIP)  has  an associated name, its behaviour is modified. When

doc/pcre2pattern.3

@@ -3558,6 +3558,10 @@ next attempt at "c". Note that a possessive quantifer does not have the same
 effect as this example; although it would suppress backtracking during the
 first match attempt, the second attempt would start at the second character
 instead of skipping on to "c".
+.P
+If (*SKIP) is used inside a lookbehind to specify a new starting point that is
+not later than the starting point of the current match, it is ignored, and the
+normal "bumpalong" occurs.
 .sp
   (*SKIP:NAME)
 .sp