internal/calculator/internal/repl: Add missing comments for exported functions

- Added Parse() comment in calculator.go
- Updated Commands() comment in repl/commands.go to be more descriptive

1 files changed, 1 insertions, 1 deletions

diff --git a/internal/repl/commands.go b/internal/repl/commands.go
index 656f670..d03672e 100644
--- a/internal/repl/commands.go
+++ b/internal/repl/commands.go
@@ -8,7 +8,7 @@ import (
 // builtinCommands defines the built-in REPL commands
 var builtinCommands = []string{"help", "clear", "quit", "exit", "rpn", "calc"}
 
-// Commands returns the list of built-in command names
+// Commands returns the list of built-in command names supported by the REPL.
 func Commands() []string {
 	return builtinCommands
 }