Add note that non-greedy regular expressions are not supported to function help

Author: nyalldawson

resources/function_help/regexp_match

@@ -7,7 +7,7 @@ Returns true if any part of a string matches the supplied regular expression.
 <p><h4>Arguments</h4>
 <!-- List args for functions here-->
 <i>  string</i> &rarr; is string.  The string to test against the regular expression.<br>
-<i>  regex</i> &rarr; is string.  The regular expression to test against. Backslash characters must be double escaped (eg "\\s" to match a white space character).<br>
+<i>  regex</i> &rarr; is string.  The regular expression to test against. Backslash characters must be double escaped (eg "\\s" to match a white space character). Non-greedy regular expressions are not supported.<br>
 
 <p><h4>Example</h4>
 <!-- Show example of function.-->

resources/function_help/regexp_replace

@@ -7,7 +7,7 @@ Returns a string with the supplied regular expression replaced.
 <p><h4>Arguments</h4>
 <!-- List args for functions here-->
 <i>  string</i> &rarr; is string.  The start string.<br>
-<i>  regex</i> &rarr; is string.  The regular expression to replace. Backslash characters must be double escaped (eg "\\s" to match a white space character).<br>
+<i>  regex</i> &rarr; is string.  The regular expression to replace. Backslash characters must be double escaped (eg "\\s" to match a white space character). Non-greedy regular expressions are not supported.<br>
 <i>  after</i> &rarr; is string.  The string that will replace any matching occurences of the supplied regular expression. Captured groups can be inserted into the replacement string using \\1, \\2, etc. <br></p>
 
 <p><h4>Example</h4>

resources/function_help/regexp_substr

@@ -7,7 +7,7 @@ Returns the portion of a string which matches a supplied regular expression.
 <p><h4>Arguments</h4>
 <!-- List args for functions here-->
 <i>  string</i> &rarr; is string.  The input string.<br>
-<i>  regex</i> &rarr; is string.  The regular expression to match against. Backslash characters must be double escaped (eg "\\s" to match a white space character).<br>
+<i>  regex</i> &rarr; is string.  The regular expression to match against. Backslash characters must be double escaped (eg "\\s" to match a white space character). Non-greedy regular expressions are not supported.<br>
 
 <p><h4>Example</h4>
 <!-- Show example of function.-->