Remove unnecessary escaping in C character literals

'\"' is more commonly written simply as '"'.

src/backend/nodes/outfuncs.c

@@ -124,7 +124,7 @@ _outToken(StringInfo str, const char *s)
 	 */
 	/* These characters only need to be quoted at the start of the string */
 	if (*s == '<' ||
-		*s == '\"' ||
+		*s == '"' ||
 		isdigit((unsigned char) *s) ||
 		((*s == '+' || *s == '-') &&
 		 (isdigit((unsigned char) s[1]) || s[1] == '.')))

src/backend/nodes/read.c

@@ -245,7 +245,7 @@ nodeTokenType(char *token, int length)
 		retval = RIGHT_PAREN;
 	else if (*token == '{')
 		retval = LEFT_BRACE;
-	else if (*token == '\"' && length > 1 && token[length - 1] == '\"')
+	else if (*token == '"' && length > 1 && token[length - 1] == '"')
 		retval = T_String;
 	else if (*token == 'b')
 		retval = T_BitString;

src/backend/utils/adt/arrayfuncs.c

@@ -515,7 +515,7 @@ ArrayCount(const char *str, int *dim, char typdelim)
 							  errmsg("malformed array literal: \"%s\"", str),
 								 errdetail("Unexpected end of input.")));
 					break;
-				case '\"':
+				case '"':
 
 					/*
 					 * A quote must be after a level start, after a quoted
@@ -799,7 +799,7 @@ ReadArrayStr(char *arrayStr,
 					dstendptr = dstptr;
 					hasquoting = true;	/* can't be a NULL marker */
 					break;
-				case '\"':
+				case '"':
 					in_quotes = !in_quotes;
 					if (in_quotes)
 						leadingspace = false;

src/backend/utils/adt/json.c

@@ -2415,7 +2415,7 @@ escape_json(StringInfo buf, const char *str)
 {
 	const char *p;
 
-	appendStringInfoCharMacro(buf, '\"');
+	appendStringInfoCharMacro(buf, '"');
 	for (p = str; *p; p++)
 	{
 		switch (*p)
@@ -2449,7 +2449,7 @@ escape_json(StringInfo buf, const char *str)
 				break;
 		}
 	}
-	appendStringInfoCharMacro(buf, '\"');
+	appendStringInfoCharMacro(buf, '"');
 }
 
 /*

src/backend/utils/adt/rangetypes.c

@@ -2132,11 +2132,11 @@ range_parse_bound(const char *string, const char *ptr,
 							 errdetail("Unexpected end of input.")));
 				appendStringInfoChar(&buf, *ptr++);
 			}
-			else if (ch == '\"')
+			else if (ch == '"')
 			{
 				if (!inquote)
 					inquote = true;
-				else if (*ptr == '\"')
+				else if (*ptr == '"')
 				{
 					/* doubled quote within quote sequence */
 					appendStringInfoChar(&buf, *ptr++);

src/backend/utils/adt/rowtypes.c

@@ -216,11 +216,11 @@ record_in(PG_FUNCTION_ARGS)
 								 errdetail("Unexpected end of input.")));
 					appendStringInfoChar(&buf, *ptr++);
 				}
-				else if (ch == '\"')
+				else if (ch == '"')
 				{
 					if (!inquote)
 						inquote = true;
-					else if (*ptr == '\"')
+					else if (*ptr == '"')
 					{
 						/* doubled quote within quote sequence */
 						appendStringInfoChar(&buf, *ptr++);

src/backend/utils/adt/varlena.c

@@ -3007,16 +3007,16 @@ SplitIdentifierString(char *rawstring, char separator,
 		char	   *curname;
 		char	   *endp;
 
-		if (*nextp == '\"')
+		if (*nextp == '"')
 		{
 			/* Quoted name --- collapse quote-quote pairs, no downcasing */
 			curname = nextp + 1;
 			for (;;)
 			{
-				endp = strchr(nextp + 1, '\"');
+				endp = strchr(nextp + 1, '"');
 				if (endp == NULL)
 					return false;		/* mismatched quotes */
-				if (endp[1] != '\"')
+				if (endp[1] != '"')
 					break;		/* found end of quoted name */
 				/* Collapse adjacent quotes into one quote, and look again */
 				memmove(endp, endp + 1, strlen(endp));
@@ -3132,16 +3132,16 @@ SplitDirectoriesString(char *rawstring, char separator,
 		char	   *curname;
 		char	   *endp;
 
-		if (*nextp == '\"')
+		if (*nextp == '"')
 		{
 			/* Quoted name --- collapse quote-quote pairs */
 			curname = nextp + 1;
 			for (;;)
 			{
-				endp = strchr(nextp + 1, '\"');
+				endp = strchr(nextp + 1, '"');
 				if (endp == NULL)
 					return false;		/* mismatched quotes */
-				if (endp[1] != '\"')
+				if (endp[1] != '"')
 					break;		/* found end of quoted name */
 				/* Collapse adjacent quotes into one quote, and look again */
 				memmove(endp, endp + 1, strlen(endp));

src/bin/pg_dump/dumputils.c

@@ -130,7 +130,7 @@ fmtId(const char *rawid)
 	}
 	else
 	{
-		appendPQExpBufferChar(id_return, '\"');
+		appendPQExpBufferChar(id_return, '"');
 		for (cp = rawid; *cp; cp++)
 		{
 			/*
@@ -138,11 +138,11 @@ fmtId(const char *rawid)
 			 * double double-quote per SQL99. Before, we put in a
 			 * backslash/double-quote pair. - thomas 2000-08-05
 			 */
-			if (*cp == '\"')
-				appendPQExpBufferChar(id_return, '\"');
+			if (*cp == '"')
+				appendPQExpBufferChar(id_return, '"');
 			appendPQExpBufferChar(id_return, *cp);
 		}
-		appendPQExpBufferChar(id_return, '\"');
+		appendPQExpBufferChar(id_return, '"');
 	}
 
 	return id_return->data;

src/interfaces/ecpg/preproc/output.c

@@ -197,7 +197,7 @@ output_escaped_str(char *str, bool quoted)
 	int			i = 0;
 	int			len = strlen(str);
 
-	if (quoted && str[0] == '\"' && str[len - 1] == '\"')		/* do not escape quotes
+	if (quoted && str[0] == '"' && str[len - 1] == '"')		/* do not escape quotes
 																 * at beginning and end
 																 * if quoted string */
 	{
@@ -241,6 +241,6 @@ output_escaped_str(char *str, bool quoted)
 			fputc(str[i], yyout);
 	}
 
-	if (quoted && str[0] == '\"' && str[len] == '\"')
+	if (quoted && str[0] == '"' && str[len] == '"')
 		fputs("\"", yyout);
 }