accidental typo fixed

Author: alexgoto

src/asm.md

@@ -114,8 +114,7 @@ $ cargo objdump --bin app --release -- -s -j .vector_table
 
 The downside of using the `cc` crate is that it requires some assembler program
 on the build machine. For example when targeting ARM Cortex-M the `cc` crate
-uses `arm
-ne-eabi-gcc` as the assembler.
+uses `arm-none-eabi-gcc` as the assembler.
 
 Instead of assembling the file on the build machine we can ship a pre-assembled
 file with the `rt` crate. That way no assembler program is required on the build