Quote parameter substitutions and command substitutions in

build_version() of bin/kaleidoscope-builder. Issue #299.

bin/kaleidoscope-builder

@@ -7,10 +7,10 @@ set -e
 ######
 
 build_version () {
-    GIT_VERSION="$(cd $(find_sketch); git describe --abbrev=4 --dirty --always)"
-    LIB_VERSION="$(cd $(find_sketch); (grep version= ../../library.properties 2>/dev/null || echo version=0.0.0) | cut -d= -f2)-g${GIT_VERSION}"
+    GIT_VERSION="$(cd "$(find_sketch)"; git describe --abbrev=4 --dirty --always)"
+    LIB_VERSION="$(cd "$(find_sketch)"; (grep version= ../../library.properties 2>/dev/null || echo version=0.0.0) | cut -d= -f2)-g${GIT_VERSION}"
 
-    BUILD_PATH="${BUILD_PATH:-$(mktemp -d 2>/dev/null || mktemp -d -t 'build')}"
+    BUILD_PATH="${BUILD_PATH:-"$(mktemp -d 2>/dev/null || mktemp -d -t 'build')"}"
     OUTPUT_DIR="${OUTPUT_DIR:-output/${LIBRARY}}"
     OUTPUT_PATH="${OUTPUT_PATH:-${SOURCEDIR}/${OUTPUT_DIR}}"
 }