In many monospaced fonts, the shape of the curly single quotes (U+2018, U+2019) and curly double quotes (U+201c, U+201d) is the same as the shape for the comma. It's the case for DejaVu Sans Mono (upon which Hack is based), Source Code Pro, inconsolata, and others.
In Hack, however, the comma (and the semi-colon) are very roundish, but the curly quotes keep the squareness of DejaVu Sans Mono.
In many monospaced fonts, the shape of the curly single quotes (U+2018, U+2019) and curly double quotes (U+201c, U+201d) is the same as the shape for the comma. It's the case for DejaVu Sans Mono (upon which Hack is based), Source Code Pro, inconsolata, and others.
In Hack, however, the comma (and the semi-colon) are very roundish, but the curly quotes keep the squareness of DejaVu Sans Mono.
Examples: