Exclude correct entries in smallest-no-std grep

Author: austinbes

ci/script.sh

@@ -31,7 +31,7 @@ main() {
 
     # check presence of the `rust_begin_unwind` symbol
     diff app.o.nm \
-         <(cargo nm -- target/thumbv7m-none-eabi/debug/deps/app-*.o | grep '[0-9]* [^n] ')
+         <(cargo nm -- target/thumbv7m-none-eabi/debug/deps/app-*.o | grep '[0-9]* [^N] ')
 
     edition_check
 

src/smallest-no-std.md

@@ -83,7 +83,7 @@ Before linking the crate does contain the panicking symbol.
 ``` console
 $ cargo rustc --target thumbv7m-none-eabi -- --emit=obj
 
-$ cargo nm -- target/thumbv7m-none-eabi/debug/deps/app-*.o | grep '[0-9]* [^n] '
+$ cargo nm -- target/thumbv7m-none-eabi/debug/deps/app-*.o | grep '[0-9]* [^N] '
 ```
 
 ``` text