CI scripts update

ci-scripts/install-minuit.sh

@@ -1,26 +1,26 @@
 #!/usr/bin/env bash
 
-
-if (( $# != 2 )); then
-  echo "usage: `basename $0` <prefix> <ntasks>" 1>&2
+if (($# != 2)); then
+  echo "usage: $(basename "$0") <prefix> <ntasks>" 1>&2
   exit 1
 fi
-PREFIX=$1
-NTASKS=$2
+prefix=$1
+ntasks=$2
 
 set -ex
-INITDIR=$(pwd -P)
-mkdir -p ${PREFIX}
-cd ${PREFIX}
-PREFIX=$(pwd -P)
-cd ${INITDIR}/local/build
+init_dir=$(pwd -P)
+mkdir -p "${prefix}"
+cd "${prefix}"
+prefix=$(pwd -P)
+cd "${init_dir}/local/build"
 rm -rf root
 git clone https://github.com/root-project/root.git
 cd root/math/minuit2/
-mkdir build; cd build
-cmake .. -Dminuit2_standalone=ON -DCMAKE_INSTALL_PREFIX=${PREFIX}
-make -j${NTASKS}
+mkdir build
+cd build
+cmake .. -Dminuit2_standalone=ON -DCMAKE_INSTALL_PREFIX="${prefix}"
+make -j "${ntasks}"
 make install
-cd ${INITDIR}/local
+cd "${init_dir}/local"
 touch .built.minuit
-cd ${INITDIR}
+cd "${init_dir}"