Tweak messages

Author: jserv

README.md

@@ -90,13 +90,13 @@ Run `make` and you should see this:
 ```
 
 File `out/shecc` is the first stage compiler. Its usage:
-```
-shecc [-o output] [+m] [--no-libc] [--dump-ir] <infile.c>
+```shell
+$ shecc [-o output] [+m] [--no-libc] [--dump-ir] <infile.c>
 ```
 
 Compiler options:
-- `-o` : output file name (default: out.elf)
-- `+m` : Enable hardware multiplication and division instructions (default: disabled)
+- `-o` : Specify output file name (default: `out.elf`)
+- `+m` : Use hardware multiplication/division instructions (default: disabled)
 - `--no-libc` : Exclude embedded C library (default: embedded)
 - `--dump-ir` : Dump intermediate representation (IR)