Fix tokenization of doubles

Fixes #9600.

core/variant_parser.cpp

@@ -326,6 +326,7 @@ Error VariantParser::get_token(Stream *p_stream, Token &r_token, int &line, Stri
 									is_float = true;
 								} else if (c == 'e') {
 									reading = READING_EXP;
+									is_float = true;
 								} else {
 									reading = READING_DONE;
 								}
@@ -337,7 +338,6 @@ Error VariantParser::get_token(Stream *p_stream, Token &r_token, int &line, Stri
 
 								} else if (c == 'e') {
 									reading = READING_EXP;
-
 								} else {
 									reading = READING_DONE;
 								}
@@ -349,8 +349,6 @@ Error VariantParser::get_token(Stream *p_stream, Token &r_token, int &line, Stri
 									exp_beg = true;
 
 								} else if ((c == '-' || c == '+') && !exp_sign && !exp_beg) {
-									if (c == '-')
-										is_float = true;
 									exp_sign = true;
 
 								} else {