main: Fix comments referencing main.cpp

Main reason is so we don't have that stupid arl prefix directory in
our source code.  Now our source code is flat, and we can still
reference headers by linking from root.

Makefile

@@ -8,7 +8,7 @@ UNITS=main lib/vec lib/sv parser/ast parser/parser
 OBJECTS:=$(patsubst %,$(DIST)/%.o, $(UNITS))
 
 LDFLAGS=
-GFLAGS=-Wall -Wextra -Wpedantic -std=c23 -I./src/
+GFLAGS=-Wall -Wextra -Wpedantic -std=c23 -I./include/
 DFLAGS=-ggdb -fsanitize=address -fsanitize=undefined
 RFLAGS=-O3
 
@@ -26,7 +26,7 @@ DEPDIR=$(DIST)/deps
 $(OUT): $(OBJECTS) | $(DIST)
 	$(CC) $(CFLAGS) -o $@ $^ $(LDFLAGS)
 
-$(DIST)/%.o: src/arl/%.c | $(DIST) $(DEPDIR)
+$(DIST)/%.o: src/%.c | $(DIST) $(DEPDIR)
 	$(CC) $(CFLAGS) $(DEPFLAGS) $(DEPDIR)/$*.d -c -o $@ $<
 
 $(DIST):

src/lib/sv.c

@@ -2,7 +2,7 @@
  * Created: 2026-01-22
  * Author: Aryadev Chavali
  * License: See end of file
- * Commentary: See /include/sv.h
+ * Commentary: See /include/arl/lib/sv.h
  */
 
 #include <string.h>

src/main.c

@@ -1,4 +1,4 @@
-/* main.cpp:
+/* main.c:
  * Created: 2026-01-22
  * Author: Aryadev Chavali
  * License: See end of file

src/parser/ast.c

@@ -2,7 +2,7 @@
  * Created: 2026-01-22
  * Author: Aryadev Chavali
  * License: See end of file
- * Commentary: See ast.h.
+ * Commentary: See /include/arl/parser/ast.h.
  */
 
 #include <arl/lib/base.h>

src/parser/parser.c

@@ -2,7 +2,7 @@
  * Created: 2026-01-22
  * Author: Aryadev Chavali
  * License: See end of file
- * Commentary: See parser.h
+ * Commentary: See /include/arl/parser/parser.h
  */
 
 #include <ctype.h>