Fix -Wuseless-escape warnings emitted by re2c (php#19050)

re2c version 4 enabled some warnings by default. This fixes re2c code
for the `-Wuseless-escape` warnings.

There are two same issues reported.
Issue: phpGH-17523
Closes: phpGH-17204

Author: petk

NEWS

@@ -10,6 +10,7 @@ PHP                                                                        NEWS
     order). (Daniil Gentili)
   . Fix OSS-Fuzz #427814456. (nielsdos)
   . Fix OSS-Fuzz #428983568 and #428760800. (nielsdos)
+  . Fixed bug GH-17204 -Wuseless-escape warnings emitted by re2c. (Peter Kokot)
 
 - Curl:
   . Fix memory leaks when returning refcounted value from curl callback.

Zend/zend_ini_scanner.l

@@ -352,16 +352,16 @@ restart:
 /*!re2c
 re2c:yyfill:check = 0;
 LNUM [0-9]+
-DNUM ([0-9]*[\.][0-9]+)|([0-9]+[\.][0-9]*)
+DNUM ([0-9]*[.][0-9]+)|([0-9]+[.][0-9]*)
 NUMBER [-]?{LNUM}|{DNUM}
 ANY_CHAR (.|[\n\t])
 NEWLINE	("\r"|"\n"|"\r\n")
 TABS_AND_SPACES [ \t]
 WHITESPACE [ \t]+
 CONSTANT [a-zA-Z_][a-zA-Z0-9_]*
-LABEL_CHAR [^=\n\r\t;&|^$~(){}!"\[\]\x00]
+LABEL_CHAR [^=\n\r\t;&|^$~(){}!"[\]\x00]
 LABEL ({LABEL_CHAR}+)
-TOKENS [:,.\[\]"'()&|^+-/*=%$!~<>?@{}]
+TOKENS [:,.[\]"'()&|^+-/*=%$!~<>?@{}]
 OPERATORS [&|^~()!]
 DOLLAR_CURLY "${"
 

Zend/zend_language_scanner.l

@@ -1801,11 +1801,11 @@ OPTIONAL_WHITESPACE_OR_COMMENTS ({WHITESPACE}|{MULTI_LINE_COMMENT}|{SINGLE_LINE_
 	RETURN_TOKEN(T_MUL_EQUAL);
 }
 
-<ST_IN_SCRIPTING>"*\*" {
+<ST_IN_SCRIPTING>"**" {
 	RETURN_TOKEN(T_POW);
 }
 
-<ST_IN_SCRIPTING>"*\*=" {
+<ST_IN_SCRIPTING>"**=" {
 	RETURN_TOKEN(T_POW_EQUAL);
 }
 

sapi/phpdbg/phpdbg_lexer.l

@@ -77,7 +77,7 @@ T_IF        'if'
 T_RUN       'run'
 T_RUN_SHORT "r"
 WS          [ \r\t]+
-DIGITS      [-]?[0-9\.]+
+DIGITS      [-]?[0-9.]+
 ID          [^ \r\n\t:#\000]+
 GENERIC_ID  ([^ \r\n\t:#\000"']|":\\")+|["]([^\n\000"\\]|"\\\\"|"\\"["])+["]|[']([^\n\000'\\]|"\\\\"|"\\"['])+[']
 ADDR        [0][x][a-fA-F0-9]+