Fix typo (#690)

Author: ltrzesniewski

doc/html/pcre2api.html

@@ -4049,7 +4049,7 @@ <h1>pcre2api man page</h1>
 <b>  void *<i>callout_data</i>);</b>
 <br>
 <br>
-The <b>pcre2_set_substitution_callout()</b> function can be used to specify a
+The <b>pcre2_set_substitute_callout()</b> function can be used to specify a
 callout function for <b>pcre2_substitute()</b>. This information is passed in
 a match context. The callout function is called after each substitution has
 been processed, but it can cause the replacement not to happen.
@@ -4123,7 +4123,7 @@ <h1>pcre2api man page</h1>
 <b>  void *<i>callout_data</i>);</b>
 <br>
 <br>
-The <b>pcre2_set_substitution_case_callout()</b> function can be used to specify
+The <b>pcre2_set_substitute_case_callout()</b> function can be used to specify
 a callout function for <b>pcre2_substitute()</b> to use when performing case
 transformations. This does not affect any case insensitivity behaviour when
 performing a match, but only the user-visible transformations performed when

doc/pcre2.txt

@@ -3894,7 +3894,7 @@ CREATING A NEW STRING WITH SUBSTITUTIONS
          int (*callout_function)(pcre2_substitute_callout_block *, void *),
          void *callout_data);
 
-       The pcre2_set_substitution_callout() function can be used to specify  a
+       The pcre2_set_substitute_callout() function can be used to specify  a
        callout  function for pcre2_substitute(). This information is passed in
        a match context. The callout function is called after each substitution
        has been processed, but it can cause the replacement not to happen.
@@ -3959,7 +3959,7 @@ CREATING A NEW STRING WITH SUBSTITUTIONS
                                         int, void *),
          void *callout_data);
 
-       The pcre2_set_substitution_case_callout() function can be used to spec-
+       The pcre2_set_substitute_case_callout() function can be used to spec-
        ify  a  callout  function for pcre2_substitute() to use when performing
        case transformations. This does not affect any case  insensitivity  be-
        haviour  when performing a match, but only the user-visible transforma-

doc/pcre2api.3

@@ -4039,7 +4039,7 @@ above).
 .B "  void *\fIcallout_data\fP);"
 .fi
 .sp
-The \fBpcre2_set_substitution_callout()\fP function can be used to specify a
+The \fBpcre2_set_substitute_callout()\fP function can be used to specify a
 callout function for \fBpcre2_substitute()\fP. This information is passed in
 a match context. The callout function is called after each substitution has
 been processed, but it can cause the replacement not to happen.
@@ -4107,7 +4107,7 @@ matches so far.
 .B "  void *\fIcallout_data\fP);"
 .fi
 .sp
-The \fBpcre2_set_substitution_case_callout()\fP function can be used to specify
+The \fBpcre2_set_substitute_case_callout()\fP function can be used to specify
 a callout function for \fBpcre2_substitute()\fP to use when performing case
 transformations. This does not affect any case insensitivity behaviour when
 performing a match, but only the user-visible transformations performed when