Spellchecking compiler code

Address some spelling mistakes in strings, private function names, and function params.

Author: nyurik

rustup.sh

@@ -10,7 +10,7 @@ case $1 in
         rustup toolchain install --profile minimal nightly-${TOOLCHAIN} # Sanity check to see if the nightly exists
         echo nightly-${TOOLCHAIN} > rust-toolchain
 
-        echo "=> Uninstalling all old nighlies"
+        echo "=> Uninstalling all old nightlies"
         for nightly in $(rustup toolchain list | grep nightly | grep -v $TOOLCHAIN | grep -v nightly-x86_64); do
             rustup toolchain uninstall $nightly
         done