feat(lexer): comment handling + healthy changes

src/lexer/lexer_utils.h

@@ -1,8 +1,8 @@
 #ifndef LEXER_UTILS_H
 #define LEXER_UTILS_H
 
-#include <sys/types.h>
 #include <stddef.h>
+#include <sys/types.h>
 
 struct lexer_context
 {
@@ -80,12 +80,17 @@ void free_token(struct token **tok);
 /*
  * @brief: checks if the stream used for the last token creation is empty.
  *         If it is, it calls stream_read() from IO_backend,
- *         and sets [remaing_chars].
+ *         and sets [remaining_chars].
  *         If not, it starts from the end of the last token.
  *         Also trims left blanks before returning.
  *
  * @return: char* stream from which we tokenise.
  */
-char *stream_init(struct lexer_context *ctx);
+void stream_init(struct lexer_context *ctx);
+
+/*
+ * @brief: drops the current stream and asks IOB for a new one
+ */
+void get_next_stream(struct lexer_context *ctx);
 
 #endif /* LEXER_UTILS_H */