Update lexer.h (#8)

Shehab7osny · web-flow · commit 5c6b901ba00d · 2021-04-25T20:30:02.000+05:30
Update lexer.h to follow the convention JUCC_LOCALNAMESPACE_FILENAME_H
diff --git a/src/include/lexer/lexer.h b/src/include/lexer/lexer.h
@@ -1,5 +1,5 @@
-#ifndef JUCC_LEXER_H
-#define JUCC_LEXER_H
+#ifndef JUCC_LEXER_LEXER_H
+#define JUCC_LEXER_LEXER_H
 
 #include <cctype>
 #include <cstdio>
