It seems there is a compromise to make between the readability of single statements versus the readability of the code as a whole.
Cherry picked from here: https://duckduckgo.com/?q=readability+%22column+width%22
https://en.wikipedia.org/wiki/Column_%28typography%29
"For best legibility, typographic manuals suggest that columns should contain roughly 60 characters per line.[1] One formula suggests multiplying the point size of the font by 2 to reach how wide a column should be in picas[2] — in effect a column width of 24 ems. Following these guidelines usually results in multiple narrow columns being favored over a single wide column.[3]"
http://psychology.wikia.com/wiki/Readability
"Ease-of-reading is the result of the interaction between the text and the reader. In the reader, those features affecting readability are 1. prior knowledge, 2. reading skill, 3. interest, and 4. motivation. In the text, those features are 1. content, 2. style, 3. design, and 4. structure[1]. The design can include the medium, layout, illustrations, reading and navigation aids, typeface, and color. Correct use of type size, line spacing, column width, text-color-background contrast and white space make text easy to read. "