CCode: Do not use Bash in MSR test
This commit fixes parts of issue
@@ -63,8 +63,8 @@ sudo kdb umount user/tests/ccode
### Custom Configuration
```sh
-# We use `%` as escape character and map the space character (hex: `20`) to the character `_`.
-sudo kdb mount config.tcl user/tests/ccode tcl base64 ccode escape=`bash -c 'printf %x \"%'` chars/20=`bash -c 'printf %x \"_'`
+# We use `%` (hex: `25`) as escape character and map the space character (hex: `20`) to the character `_` (hex `5f`).
+sudo kdb mount config.tcl user/tests/ccode tcl base64 ccode escape=25 chars/20=5f
kdb set user/tests/ccode/spaces 'one two three'
