Comments updates.

src/pcre2_match.c

@@ -6024,8 +6024,8 @@ Arguments:
 
 Returns:          > 0 => success; value is the number of ovector pairs filled
                   = 0 => success, but ovector is not big enough
-                   -1 => failed to match (PCRE2_ERROR_NOMATCH)
-                   -2 => partial match (PCRE2_ERROR_PARTIAL)
+                  = -1 => failed to match (PCRE2_ERROR_NOMATCH)
+                  = -2 => partial match (PCRE2_ERROR_PARTIAL)
                   < -2 => some kind of unexpected problem
 */
 

src/pcre2_study.c

@@ -1584,7 +1584,9 @@ return yield;
 /* This function is handed a compiled expression that it must study to produce
 information that will speed up the matching.
 
-Argument:  points to the compiled expression
+Argument:  
+  re       points to the compiled expression
+   
 Returns:   0 normally; non-zero should never normally occur
            1 unknown opcode in set_start_bits
            2 missing capturing bracket