Add test for labels when expecting symbols

src/asm/lexer.cpp

@@ -1976,7 +1976,7 @@ static Token yylex_NORMAL() {
 				}
 			}
 
-			// We need it to distinguish between label definitions (which start with `LABEL`) and
+			// We need to distinguish between label definitions (which start with `LABEL`) and
 			// macro invocations (which start with `SYMBOL`).
 			//
 			// If we had one `IDENTIFIER` token, the parser would need to perform "lookahead" to

test/asm/lex-label.asm

@@ -0,0 +1,9 @@
+def var: equ 42
+
+macro mac:
+endm
+
+for idx:, 10
+endr
+
+newcharmap french:

test/asm/lex-label.err

@@ -0,0 +1,13 @@
+error: lex-label.asm(1):
+    syntax error, unexpected label, expecting symbol
+error: lex-label.asm(3):
+    syntax error, unexpected label, expecting symbol
+error: lex-label.asm(4):
+    syntax error, unexpected ENDM
+error: lex-label.asm(6):
+    syntax error, unexpected label, expecting symbol
+error: lex-label.asm(7):
+    syntax error, unexpected ENDR
+error: lex-label.asm(9):
+    syntax error, unexpected label, expecting symbol
+Assembly aborted with 6 errors!