Simple code cleaner. Use Git to check the non-whitespace edits such as <>.

cleancode.sh

# entire file, CLI code, inplace
perl -0777pe "
# whitespace
s/    /\t/g;  # Tabs indent at a uniform and viewer-custom size.
s/\t +/\t\t/g;  # Do not mix tabs and spaces.
s/  / /g;
s/\r\n/\n/g;  # Nor line endings.
s/(catch|for|foreach|function|if|switch|while)\s+\(/\1\(/g;  # Compact flow.
s/\}\s+el(if|se)/\}el\1/g;
s/\s+\{/\{/g;  # Useless when indenting.
s/([,;])([^ \n'\"])/\1 \2/g;  # Read and wrap better.
s/{(\d+), (\d+)}/{\1,\2}/g;  # Fix regex ranges.
s/\s*([!<=>.+-]+=>*)\s*/ \1 /g;  # Read and wrap != etc.
s/\s*([!<=>.+-]=+>*)([^\\ \t\n'\"=>&])\s*/ \1 \2/g;
s/\s*([^= -])(<|>)\\\$\s*/ \1\2 \\\$/g;
#s/ (class|href|language|style|type) = / \1=/g;  # Should be in templates.
s/[\t ]+\n/\n/g;  # No trailing whitespace.
s/\n\n\n+/\n\n/g;  # One empty line is enough. Use functions or comments to separate more.
# standards
s/\s*<>\s*/ != /g;  # Not using BASIC anymore.
" -i $1

GitHub failed to find "perl" in this gist, so maybe this comment helps.