typo in install file

[SemiQuant]

I get an error when tying to install on osx using the command

remotes::install_github("xryanglab/xtail")

looks like there is a space missing here "-L/usr/local/lib -o xtail.so"

ld: warning: directory not found for option '-L/usr/local/gfortran/lib/gcc/x86_64-apple-darwin18/8.2.0'
ld: warning: directory not found for option '-L/usr/local/gfortran/lib'
ld: library not found for -lgfortran
clang: error: linker command failed with exit code 1 (use -v to see invocation)
make: *** [xtail.so] Error 1
ERROR: compilation failed for package ‘xtail’
* removing ‘/Library/Frameworks/R.framework/Versions/4.2/Resources/library/xtail’