Fix documentation pcre2test.1 (#701)

The error -47 corresponds to PCRE2_ERROR_MATCHLIMIT not PCRE2_ERROR_NOMEMORY.

Author: MegaManSec

doc/html/pcre2test.html

@@ -1590,7 +1590,7 @@ <h1>pcre2test man page</h1>
       123abc123\=replace=[10]XYZ
    1: 123XYZ123
       123abc123\=replace=[9]XYZ
-  Failed: error -47: no more memory
+  Failed: error -48: no more memory
 </pre>
 The default action of <b>pcre2_substitute()</b> is to return
 PCRE2_ERROR_NOMEMORY when the output buffer is too small. However, if the
@@ -1603,7 +1603,7 @@ <h1>pcre2test man page</h1>
 <pre>
   /abc/substitute_overflow_length
       123abc123\=replace=[9]XYZ
-  Failed: error -47: no more memory: 10 code units are needed
+  Failed: error -48: no more memory: 10 code units are needed
 </pre>
 A replacement string is ignored with POSIX and DFA matching. Specifying partial
 matching provokes an error return ("bad option value") from

doc/pcre2test.1

@@ -1555,7 +1555,7 @@ character. Here is an example that tests the edge case:
       123abc123\e=replace=[10]XYZ
    1: 123XYZ123
       123abc123\e=replace=[9]XYZ
-  Failed: error -47: no more memory
+  Failed: error -48: no more memory
 .sp
 The default action of \fBpcre2_substitute()\fP is to return
 PCRE2_ERROR_NOMEMORY when the output buffer is too small. However, if the
@@ -1568,7 +1568,7 @@ for the trailing zero) as part of the error message. For example:
 .sp
   /abc/substitute_overflow_length
       123abc123\e=replace=[9]XYZ
-  Failed: error -47: no more memory: 10 code units are needed
+  Failed: error -48: no more memory: 10 code units are needed
 .sp
 A replacement string is ignored with POSIX and DFA matching. Specifying partial
 matching provokes an error return ("bad option value") from

doc/pcre2test.txt

@@ -1436,7 +1436,7 @@ SUBJECT MODIFIERS
              123abc123\=replace=[10]XYZ
           1: 123XYZ123
              123abc123\=replace=[9]XYZ
-         Failed: error -47: no more memory
+         Failed: error -48: no more memory
 
        The  default  action  of  pcre2_substitute()  is  to  return  PCRE2_ER-
        ROR_NOMEMORY  when  the  output  buffer  is  too small. However, if the
@@ -1450,7 +1450,7 @@ SUBJECT MODIFIERS
 
          /abc/substitute_overflow_length
              123abc123\=replace=[9]XYZ
-         Failed: error -47: no more memory: 10 code units are needed
+         Failed: error -48: no more memory: 10 code units are needed
 
        A replacement string is ignored with POSIX and DFA matching. Specifying
        partial  matching  provokes  an  error return ("bad option value") from